selected invited talks

"Crystal growth techniques as tool towards complex novel materials in solid state research",  Ringvorlesung: Sustainability and Circularity: Current Developments and Opportunities in Chemistry - Focus Topic Magnetism in the Summer Term 2022, online, June 2022

"Heusler alloys – separating intrinsic and extrinsic contributions to their functional properties",  CRC 270 Summer school, online, April 2022

"Solid state single crystal growth of three-dimensional faceted LaOFeAs crystals",  7th International Conference on Superconductivity and Magnetism – ICSM2020,  online, April 2020

“Solid state single crystal growth of three-dimensional faceted LaOFeAs crystals”, Invited Plenary Lecture at the 3rd German Polish Conference on Crystal Growth (GPCCG3), Poznań, Poland, March 2019

“Single crystal growth and characterization of Fe-pnictides”, 1^st German Czechoslovak Conference on Crystal Growth (GCCCG-1), Dresden, Germany, March 2016

“New Materials for Magnonics: A crystal growth perspective”, 603. Wilhelm-Else-Hereaus Seminar 'Magnonics - Spin Waves Connecting Charges, Spins and Photons',      Bad Honnef, Germany, January 2016

“Properties of 111 pnictide superconductors – A crystal growth perspective”, IUMRS-ICAM 2015, Jeju Island, Korea, October 25^th-29^th, 2015

“Disentanglement of intrinsic and extrinsic properties in functional Heusler materials”, German Conference of Women in Physics, Dresden, October 16^th-19^th, 2014

“Single crystal growth and characterization of superconducting LiFeAs”, JEMS conference, Rhodos, Greece, August 2013

“Single crystal growth and characterization of superconducting LiFeAs”, Collaborative conference on Crystal Growth 3CG, Cancun, Mexico, June 7^th, 2013

“NMR applied to spin polarized Heusler compounds”, DFG-JST meeting 2009, Kyoto, Japan, January 19^th-21^st, 2009

list of publications

see all publications at Researcher ID 

2022 (#7)

226) Strong surface termination dependence of the electronic structure of polar superconductor LaFeAsO revealed by nano-ARPES

S.W. Jung, L.C. Rhodes, M. D. Watson, D. V. Evtushinsky, C. Cacho, S. Aswartham,
R. Kappenberger, S. Wurmehl, B. Büchner, T. K Kim

New J. Phys. 24, 113018 (2022)

225) Absence of hexagonal to square structural transition in LiFeAs vortex matter

S. Hoffmann, R. Schlegel, C. Salazar, S. Sykora, P. K. Nag, P. Khanenko, R. Beck,
S. Aswartham, S. Wurmehl, B. Büchner, Y. Fasano, C. Hess

Phys. Rev. B 106, 134507 (2022)

224)Ubiquitous enhancement of nematic fluctuations across the phase diagram of iron based superconductors probed by the Nernst effect

C. Wuttke, F. Caglieris, S. Sykora, F. Steckel, X. Hong, S. Ran, S. Khim, R. Kappenberger, S. L. Bud’ko, P.C. Canfield, S. Wurmehl, S. Aswartham, B. Büchner, C. Hess

Npj Quantum materials 7, 82 (2022)

223) Fermi surface tomography

S. Borisenko, A. Fedorov, A. Kuibarov, M. Bianchi, V. Bezguba, P. Majchrzak, P. Hofmann, P. Baumgärtel, V. Voroshnin, Y. Kushnirenko, J. Sánchez-Barriga, A. Varykhalov, . Ovsyannikov, I. Morozov, S. Aswartham, O. Feia, L.  Harnagea, S. Wurmehl, A. Kordyuk,
A. Yaresko, H. Berger, B. Büchner

Nature Comm. 13, 4132 (2022)

222) ScAuIn – A new representative of the RAuIn series

V.V. Romaka, L. Amigo, D. Franco, L.T. Corredor, S. Wurmehl, B. Büchner, S. Seiro

J. Solid State Chem. 314, 123416 (2022)

221) FeMn₃Ge₂Sn₇O₁₆: A Perfectly Isotropic 2-D Kagomé Lattice that Breaks Magnetic Symmetry with Partial Spin Order

M. C. Allison, S. Wurmehl, B. Büchner, J.  L. Vella, T. Söhnel, S. A. Bräuninger,
H.-H. Klauss, M. Avdeev, F. P. Marlton, S. Schmid, C. D. Ling

Chem. Mater. 34, 1369 (2022)

220) Thermodynamic and DFT modeling in quaternary Co-based Heusler phase space: Understanding the interplay between disorder, bonding, and magnetism

V. Romaka, A. Omar, W. Löser, B. Büchner, S. Wurmehl

Comp. Mater. Science 203, 111089 (2022)

2021 (#8)

219) Fractional spin fluctuations and quantum liquid signature in Gd₂ZnIrO₆

B. Singh, D. Kumar, V. Kumar, M. Vogl, S. Wurmehl, S. Aswartham, B. Büchner, P. Kumar

Phys. Rev. B 104, 134402 (2021)

218) Compositional Studies of Metals with Complex Order by means of the Optical Floating-Zone Technique

A. Bauer, G. Benka, A, Neubauer, A. Regnat, A. Engelhard, C. Resch, S. Wurmehl, C. G. F. Blum, T. Adams, A. Chacon, R. Jungwirth, R. Georgii, A. Senyshyn, B. Pedersen, M. Meven; C. Pfleiderer

Phys. Status Solidi B 259, 2100159 (2021)

217) Evidence for a percolative Mott insulator-metal transition in doped Sr₂IrO₄

Z. Sun, J. M. Guevara, S. Sykora, E. M. Pärschke, K. Manna, A. Maljuk, S. Wurmehl, J. van den Brink, B. Büchner, C. Hess

Phys. Rev. Research 3, 023075 (2021)

216) Revisiting the influence of Fe excess in the synthesis of BaFe₂S₃

M. L. Amigó, Q. Stahl, A. Maljuk, A. U. B. Wolter, C. Hess, J. Geck, S. Wurmehl, S. Seiro,
B. Büchner

Phys. Rev. Mater. 5, 094801 (2021)

215) Mapping out the spin fluctuations in Co-doped LaFeAsO single crystals by NMR

P. Lepucki, R.  Havemann, A. P. Dioguardi, F. Scaravaggi, A.U.B. Wolter, R. Kappenberger, S. Aswartham, S. Wurmehl, B. Büchner, H.-J. Grafe

Phys. Rev. B 103, L180506 (2021)

214)  Revisiting the phase diagram of LaFe_1−xCo_xAsO in single crystals by thermodynamic methods

F. Scaravaggi, S. Sauerland, L. Wang, R. Kappenberger, P. Lepucki, A. P. Dioguardi,
X. Hong, F. Caglieris, C. Wuttke, C. Hess, H.-J. Grafe, S. Aswartham, S. Wurmehl, R. Klingeler, A. U. B. Wolter, B. Büchner

Phys. Rev. B 103, 174506 (2021)

213) Linkage between scattering rates and superconductivity in doped ferropnictides

J. Fink, E. D. L. Rienks, M. Yao, R. Kurleto, J. Bannies, S. Aswartham, I. Morozov,
S. Wurmehl, T. Wolf, F. Hardy, C. Meingast, H. S. Jeevan, J. Maiwald, P. Gegenwart,
C. Felser, B. Büchner

Phys. Rev. B 103, 155119 (2021)

212) Strain-derivative of thermoelectric properties: a sensitive probe for nematicity

F. Caglieris, C. Wuttke, X. C. Hong, S. Sykora, R. Kappenberger, S. Aswartham,
S. Wurmehl, B. Büchner, C. Hess

npj Quantum Materials 6, 27 (2021)

2020 (#17)

211) Kramers doublets, phonons, crystal-field excitations, and their coupling in Nd₂ZnIrO₆

B. Singh, M. Vogl, S. Wurmehl, S. Aswartham, B. Büchner, P. Kumar

Phys. Rev. Research 2, 023162 (2021)

210) Kitaev magnetism and fractionalized excitations in double perovskite Sm₂ZnIrO₆

B. Singh, M. Vogl, S. Wurmehl, S. Aswartham, B. Büchner, P. Kumar

Phys. Rev. Research 2, 013040 (2020)

209) Magnetic interactions in the tripod kagome antiferromagnet Mg₂Gd₃Sb₃O₁₄ probed by static magnetometry and high-field ESR spectroscopy

C. Wellm, J. Zeisner, A. Alfonsov, M.-I. Sturza, G. Bastien, S. Gaß, S. Wurmehl, A. U. B. Wolter, B. Büchner, and V. Kataev

Phys. Rev. B 102, 214414 (2020)

208)  Evolution of Structure and Electronic Correlations in a Series of BaT₂As₂ (T = Cr–Cu) Single Crystals

S. Selter, F. Scaravaggi, R. Kappenberger, M. Naumann V. V. Romaka, M. Knupfer, S. Aswartham, A. U. B. Wolter, S. Wurmehl, B. Büchner

Inorg. Chem. 59, 16913 (2020)

207) Nematic superconductivity in LiFeAs

Y. S. Kushnirenko, D. V. Evtushinsky, T. K. Kim, I. Morozov, L. Harnagea, S. Wurmehl,
S. Aswartham, B. Büchner, A. V. Chubukov, and S. V. Borisenko

Phys. Rev. B 102, 184502 (2020)

206) Coupling of lattice, spin, and intraconfigurational excitations of Eu³⁺ in  Eu₂ZnIrO₆

B. Singh, M. Vogl, S. Wurmehl, S. Aswartham, B. Büchner, P. Kumar

Phys. Rev. Research 2, 043179 (2020)

205) Pulsed laser deposition of Fe-oxypnictides: Co- and F-substitution

S. Haindl, M. Sato, S. Wurmehl, B.  Büchner, E.  Kampert

Superconductor Science and Technology 33, 105004 (2020)

204) La₆Pd_2+xSb₁₅ (x = 0.28): A Rare-earth Palladium Intermetallic Compound with Extended Pnictogen Ribbons

M. I. Sturza, L. M Amigó, J. I Facio, F. Caglieris, S. Aswartham, S. Seiro, C. Hess, J. van den Brink, S. Wurmehl, B. Büchner

J. Solid State Chem. 291, 121578 (2020)

203) Evolution of the nematic susceptibility in LaFe_1-xCo_xAsO

X. Hong, F. Caglieris, R. Kappenberger, S. Wurmehl, S. Aswartham, F. Scaravaggi,
P. Lepucki, A. U. B. Wolter, H.-J. Grafe, B. Büchner, C. Hess

Phys. Rev. Lett. 125, 067001 (2020)

202) Discovery, Crystal Growth, and Characterization of Garnet Eu₂PbSb₂Zn₃O₁₂

R. Morrow, M. I. Sturza, R. Ray, C. Himcinschi, J. Kern, P. Schlender, S. Wurmehl, B. Büchner, M. Richter

Eur. J. Inorg. Chem. 2020, 2512 (2020)

201) Charge-transfer energy in iridates: A hard x-ray photoelectron spectroscopy study

D. Takegami, D. Kasinathan, K. K. Wolff, S. G. Altendorf, C. F. Chang, K. Hoefer,
A. Melendez-Sans, Y. Utsumi, F. Meneghin, T. D. Ha, C. H. Yen, K. Chen, C. Y. Kuo,
Y. F. Liao, K. D. Tsuei, R. Morrow, S. Wurmehl, B. Büchner, B. E. Prasad, M. Jansen,
A. C. Komarek, P. Hansmann, L. H. Tjeng

Phys. Rev. B 102, 045119 (2020)

200) Flux growth of Sr_n+1Ir_nO_3n+1 (n=1, 2, infinity) crystals

K. Manna, G. Aslan-Cansever, A. Maljuk, S. Wurmehl, S. Seiro, B. Büchner

J. Cryst. Growth 540, 125657 (2020)

199) Complex magnetic properties in the mixed 4f-5d double perovskite iridates X₂ZnIrO₆ (X = Nd, Sm, Eu, Gd)

M. Vogl, R. Morrow, A. A. Aczel, R. Beltran Rodriguez, A. U. B. Wolter, S. Wurmehl, S. Aswartham, B. Büchner

Phys. Rev. Mater. 4, 054413 (2020)

198) Experimental Evidence of Three-Gap Superconductivity in LiFeAs

T. E. Kuzmicheva, S. A. Kuzmichev, I. V. Morozov, S. Wurmehl, B. Büchner

JETP Letters 111, 350 (2020)

197) Filled Carbon Nanotubes as Anode Materials for Lithium-Ion Batteries

E. Thauer , A. Ottmann, P. Schneider, L. Möller, L. Deeg, R. Zeus, F. Wilhelmi, L. Schlestein, C. Neef, R. Ghunaim, M. Gellesch, C. Nowka, M. Scholz, M. Haft, S. Wurmehl,
K. Wenelska, E. Mijowska, A. Kapoor, A. Bajpai, S. Hampel, R. Klingeler

Molecules 25, 1064 (2020)

196) Extraction of Dzyaloshinksii-Moriya interaction from propagating spin waves

J. Lucassen, C. F. Schippers, M. A. Verheijen, P. Fritsch, E. J. Geluk, B. Barcones,
R. A. Duine, S. Wurmehl, H. J.M. Swagten, B. Koopmans,  R. Lavrijsen

Phys. Rev. B 100, 024517 (2020)

195) Unified phase diagram of F-doped LaFeAsO by means of NMR and NQR parameters

H.-J. Grafe, P. Lepucki, M. Witschel, A. P. Dioguardi, R. Kappenberger, S. Aswartham, F. Scaravaggi, S. Wurmehl, B. Büchner

Phys. Rev. B 100, 024517 (2020)

2019 (#12)

194) Strong spin resonance mode associated with suppression of soft magnetic ordering in hole-doped Ba_1-xNa_xFe₂As₂

F. Waßer, J.T. Park, S. Aswartham, S. Wurmehl, Y. Sidis, P. Steffens, K. Schmalzl,
B. Büchner, M. Braden

Npj Quantum Materials 4, 59 (2019)

193) Correlated paramagnetism and interplay of magnetic and phononic degrees of freedom in 3d-5d coupled La₂CuIrO₆

B. Singh, D. Kumar, K. Manna, A. K. Bera, G. Aslan Cansever, A. Maljuk, S. Wurmehl,
B. Büchner, P. Kumar

J. Phys.: Condens. Matter 31, 485803 (2019)

192) Energy scale of nematic ordering in the parent iron-based superconductor BaFe₂As₂

A. Fedorov, A. Yaresko, E. Haubold, Y. Kushnirenko, T. Kim, B. Büchner, S. Aswartham,
S. Wurmehl, S. Borisenko

Phys. Rev. B 100, 024517 (2019)

191) Spectroscopic evidence of nematic fluctuations in LiFeAs

Z. Sun, P. Kumar Nag, S. Sykora, S. Wurmehl, B. Büchner, C. Hess

Phys. Rev. B 100, 024506 (2019)

190) Probing the reconstructed Fermi surface of antiferromagnetic BaFe₂As₂ in one domain

M. Watson, P. Dudin, L. Rhodes, D. Evtushinsky, H. Iwasawa, S. Aswartham, S. Wurmehl,
B. Büchner, M. Hoesch, T. Kim

npj Quantum Materials (2019)

189) Evidence of hot and cold spots on the Fermi surface of LiFeAs

J. Fink, J. Nayak, E.D.L. Rienks, J. Bannies, S.Wurmehl, S. Aswartham, I. Morozov,
R. Kappenberger, M.A. ElGhazali, L. Craco, H. Rosner, C. Felser, B. Büchner

Phys. Rev. B 99, 245156 (2019)

188) Spin-polaron ladder spectrum of the spin-orbit-induced Mott insulator Sr₂IrO₄ probed by scanning tunneling spectroscopy

J. M. Guevara, Z. Sun, E. M. Pärschke, S. Sykora, K. Manna, J. Schoop, A. Maljuk,
S. Wurmehl, J. van den Brink, B. Büchner, C. Hess

Phys. Rev. B 99, 121114(R) (2019)

187) Nematicity and structure in LaFe_1-xCo_xAsO

L. Wang, S. Sauerland, F. Scaravaggi, R. Kappenberger, S. Aswartham, S. Wurmehl,  A.U.B. Wolter,  B. Büchner, R. Klingeler

J. Magn. Magn Mater. 482, 50 (2019)

186) Structure-property relationship of Co₂MnSi thin films in response to He⁺-irradiation

F. Hammerath, R. Bali, R. Huebner, M. R. D. Brandt, S. Rodan, K. Potzger, R. Boettger,
Y. Sakuraba, S. Wurmehl

Scientific reports 9, 2766 (2019)

185) Direct study of structural phase transformation in single crystalline bulk and thin film BaFe₂As₂

J. Pukenas, P. Chekhonin, M. Meißner, E. Hieckmann, S. Aswartham, J. Freudenberger,  J. Engelmann, R. Hühne,
S. Wurmehl, B. Büchner, W. Skrotzki

Micron 119, 1 (2019)

184) Orbiton-Phonon coupling in Ir⁵⁺(5d⁴) double perovskite Ba₂YIrO₆

B. Singh, G. Aslan-Cansever, T. Dey, A. Maljuk, S. Wurmehl, B. Büchner, P. Kumar

J. Phys.: Condens. Matter 31, 065603 (2019)

183) Magnetic and magnetocaloric properties of the Co_2-xMn_xB system by experiment and density functional theory

S. Ener, M. Fries, F. Hammerath, I. Opahle, E. Simon, P. Fritsch, S. Wurmehl, H. Zhang,
O. Gutfleisch

Acta Mater. 165, 270 (2019)

2018 (#14)

182) Microscopic phase diagram of LaFeAsO single crystals under pressure

P. Materne, W.L. Bi, J.Y. Zhao, M.Y. Hu, R. Kappenberger, S. Wurmehl, S. Aswartham,
B. Büchner, E.E. Alp

Phys. Rev. B 98, 174510 (2018)

181)  Evolution of magnetic order of Fe and Eu sublattices in Eu_1-xCa_xFe₂As₂ single crystals

L. Harnagea , R. Kumar, S. Singh , S. Wurmehl, A. U. B. Wolter, B. Büchner

J. Phys.: Condens. Matter 30, 415601 (2018)

180) Suppression of the magnetic order in CeFeAsO: Nonequivalence of hydrostatic and in-plane chemical pressure

P. Materne, W. Bi, E. E. Alp, J. Zhao, M. Yu Hu, A. Jesche, C. Geibel, R. Kappenberger,
S. Aswartham, S. Wurmehl, B. Büchner, D. Zhang, T. Goltz, J. Spehling, H.-H. Klauss

Phys. Rev. B 98, 014517 (2018)

179) Unraveling the Nature of Magnetism of the 5d⁴ Double Perovskite Ba₂YIrO₆

S. Fuchs, T. Dey, G. Aslan-Cansever, A. Maljuk, S. Wurmehl, B. Büchner,  V. Kataev

Phys. Rev. Lett. 120, 237204 (2018)

178) Static and dynamic magnetism of Ir-based double perovskites La₂BIrO₆ (B=Co, Zn) probed by magnetic resonance spectroscopies

M. Iakovleva, S. Fuchs, A. Alfonsov, H.-J. Grafe, M. Vogl, S. Wurmehl, T. Dey, B. Büchner, E. Vavilova, V. Kataev

Phys. Rev. B 98, 174401 (2018)

177) Crystal growth of off-stoichiometric Co₂Cr_1−xAl_1+x Heusler compounds: Avoiding the solid state miscibility gap

A. Omar, F. Börrnert, M. Haft, S. Hampel, W. Löser, B. Büchner, S. Wurmehl

J. Cryst. Growth 498, 103 (2018)

176) Phase dynamics, structural, and magnetic properties of a Mn_2.6Ga_1-xSn_x alloy series

D. Hettmann, W. Löser, C.G.F. Blum, S. Wurmehl

J. Alloys Cmpds. 748, 430 (2018)

175) Impact of concomitant Y and Mn substitution on superconductivity in La_1−yY_yFe_1−xMn_xAsO_0.89F_0.11

R. Kappenberger, F. Hammerath, P. Rousse, M. Asfaw Afrassa, M. H. Haghighi,
S. Kamusella, G. Prando, G. Lamura, A. U. B. Wolter, M. Moroni, S. Sanna, P. Carretta,
C. Hess, H.-J. Grafe, H.-H. Klauss, S. Wurmehl, B. Büchner

Phys. Rev. B 97, 054522 (2018)

174) Increasing stripe-type fluctuations in AFe₂As₂ (A = K, Rb, Cs) superconductors probed by  ⁷⁵As NMR spectroscopy

Z. T. Zhang, D. Dmytriieva, S. Molatta, J. Wosnitza, S. Khim, S. Gass, A. U. B. Wolter,
S. Wurmehl, H.-J. Grafe, H. Kühne

Phys. Rev. B 97, 115110 (2018)

173) Observation of heavy spin-orbit excitons propagating in a nonmagnetic background:
The case of A₂YIrO₆ (A = Ba, Sr)

M. Kusch, V. M. Katukuri, N. A. Bogdanov,  B. Büchner, T. Dey, D. Efremov, J. E. Hamann-Borrero, B. H. Kim, M. Krisch, A. Maljuk, M. Moretti Sala, S. Wurmehl, G. Aslan-Cansever,
M. Sturza, L. Hozoi, J. van den Brink, J. Geck

Phys. Rev. B 97, 064421 (2018)

172) Carbon nanotube-assisted synthesis of ferromagnetic Heusler nanoparticles of Fe₃Ga

R. Ghunaim, V. Eckert, M. Scholz, M. Gellesch, S. Wurmehl, C. Damm, B. Büchner,
M. Mertig, S. Hampel

J. Mater. Chem. C 6, 1255 (2018)

171)  Interplay of 3d- and 5d-sublattice magnetism in double-perovskite La₂Zn_1-xCo_xIrO₆

M. Vogl, L. T. Corredor, T. Dey, R. Morrow, F. Scaravaggi, A. U. B. Wolter, S. Aswartham,
S. Wurmehl, B. Büchner

Phys. Rev. B 97, 035155 (2018)

170) Inhomogeneities and superconductivity in poly-phase Fe-Se-Te systems

S. Hartwig, N. Schäfer, M. Schulze, S. Landsgesell, D. Abou-Ras, C.G.F. Blum, S. Wurmehl,  A. Sokolowski, B. Büchner, K. Prokes

Physica B: Condens. Matter 531, 102 (2018)

169) Solid state single crystal growth of three-dimensional faceted LaFeAsO crystals

R. Kappenberger, S. Aswartham, F. Scaravaggi, C. G.F. Blum, M. I. Sturza, A.U.B. Wolter,
S. Wurmehl, B. Büchner

J. Cryst. Growth 483, 9 (2018)

2017 (#18)

168) Electrochemical Magnetization Switching and Energy Storage in Manganese Oxide filled Carbon Nanotubes

A. Ottmann, M. Scholz, M. Haft, E. Thauer, P. Schneider, M. Gellesch, C. Nowka,
S. Wurmehl, S. Hampel, R. Klingeler

Scientific Reports 7, 13625 (2017)

167) Neutron diffraction study of the inverse spinels Co₂TiO₄ and Co₂SnO₄

S. Thota, M. Reehuis, A. Maljuk, A. Hoser, J.-U. Hoffmann, B. Weise, A. Waske, M. Krautz, D. C. Joshi, S. Nayak, S. Ghosh, P. Suresh, K. Dasari, S. Wurmehl, O. Prokhnenko,
B. Büchner

Phys. Rev. B 96, 144104 (2017)

166) Unusual two-dimensional behavior of iron-based superconductors with low anisotropy

A. A. Kalenyuk, A. Pagliero, E. A. Borodianskyi, S. Aswartham, S. Wurmehl, B. Büchner,
D. A. Chareev, A. A. Kordyuk, V. M. Krasnov

Phys. Rev. B 96, 134512 (2017)

165) Compositional analysis of multi-element magnetic nanoparticles with a combined NMR and TEM approach

M. Gellesch, F. Hammerath, V. Suess, M. Haft, S. Hampel, S. Wurmehl, B. Büchner

J. Nanoparticle Research 19, 307 (2017)

164)Diluted paramagnetic impurities in nonmagnetic Ba₂YIrO₆

F. Hammerath, R. Sarkar, S. Kamusella, C. Baines, H.-H. Klauss, T. Dey, A. Maljuk, S. Gaß, A. U. B. Wolter, H.-J. Grafe, S. Wurmehl, B. Büchner

Phys. Rev. B 96, 165108 (2017)

163) High-energy electronic interaction in the 3d band of high-temperature iron-based superconductors

D. V. Evtushinsky, A. N. Yaresko, V. B. Zabolotnyy, J. Maletz, T. K. Kim, A. A. Kordyuk, M. S. Viazovska, M. Roslova, I. Morozov, R. Beck, S. Aswartham, L. Harnagea, S. Wurmehl, H. Berger, V. A. Rogalev, V. N. Strocov, T. Wolf, N. D. Zhigadlo, B. Büchner, S. V. Borisenko

Phys. Rev. B 96, 060501(R) (2017)

162) Signatures of a magnetic field-induced unconventional nematic liquid in the frustrated and anisotropic spin-chain cuprate LiCuSbO₄

H.-J. Grafe, S. Nishimoto, M. Iakovleva, E. Vavilova, L. Spillecke, A. Alfonsov, M.-I. Sturza, S. Wurmehl, H. Nojiri, H. Rosner, J. Richter, U. K. Rößler, S.-L. Drechsler, V. Kataev,
B. Büchner

Scientific Reports 7, 6720 (2017)

161) Experimental realization of type-II Weyl state in noncentrosymmetric TaIrTe₄

E. Haubold, K. Koepernik, D. Efremov, S. Khim, A. Fedorov, Y. Kushnirenko, J. van den Brink, S. Wurmehl, B. Büchner, T. K. Kim, M. Hoesch, K. Sumida, K. Taguchi, T. Yoshikawa, A. Kimura, T. Okuda, S. V. Borisenko

Phys. Rev. B 95, 241108 (2017)

160) Experimental evidence for importance of Hund's exchange interaction for incoherence of charge carriers in iron-based superconductors        

J. Fink, E. D. L. Rienks, S. Thirupathaiah, J. Nayak, A. van Roekeghem, S. Biermann, T. Wolf, P. Adelmann, H. S. Jeevan, P. Gegenwart, S. Wurmehl, C. Felser, B. Büchner

Phys. Rev. B 95, 144513 (2017)

159) Iridium double perovskite Sr₂YIrO₆: A combined structural and specific heat study

L. T. Corredor, G. Aslan-Cansever, M. Sturza, Kaustuv Manna, A. Maljuk, S. Gass, T. Dey, A. U. B. Wolter, Olga Kataeva, A. Zimmermann, M. Geyer, C. G. F. Blum, S. Wurmehl,
B. Büchner

Phys. Rev. B 95, 064418 (2017)

158) 3D oxalate-based coordination polymers: Relationship between structure, magnetism and color, studied by high-field ESR spectroscopy

D. Ziilic, K. Molcanov, M. Juric,  J. Habjanic, B. Rakvin, Y. Krupskaya, V. Kataev,
S. Wurmehl, B. Büchner

Polyhedron, 126 120 (2017)

157) Electronic structure and ultrafast dynamics of FeAs-based superconductors by angle- and time-resolved photoemission spectroscopy

I. Avigo, S. Thirupathaiah, E. D. L. Rienks, L. Rettig, A. Charnukha, M. Ligges, R. Cortes,
J. Nayak, H. S. Jeevan, T.Wolf, Y. Huang, S. Wurmehl, M. I. Sturza, P. Gegenwart,
M. S. Golden, L.X.Yang, K. Rossnagel, M. Bauer, B. Büchner, M. Vojta, M. Wolf, C. Felser, J. Fink, U. Bovensiepen

Phys. Status Solidi B 254,1600382 (2017)

156) The role of spin-orbit coupling in the electronic structure of iron-based superconductors

S. Borisenko, D. Evtushinsky, Z. Liu, I. Morozov, R. Kappenberger, S. Wurmehl, B. Büchner,  A. Yaresko, T. Kim, M. Hoesch, T. Wolf, N. Zhigadlo

Phys. Status Solidi B 254, 1600550 (2017)

155) A calorimetric investigation of RbFe₂As₂ single crystals

S. Khim, S. Aswartham, V. Grinenko, D. Efremov, C. G. F. Blum, F. Steckel, D. Gruner,
A. U. B. Wolter, S.-L. Drechsler, C. Heß, S. Wurmehl, B. Büchner

Phys. Status Solidi B 254, 1600208 (2017)

154) C-axis transport of pnictide superconductors

P. Müller, Y. Koval, I. Lazareva, C. Steiner, S. Wurmehl, B. Büchner, T. Stürzer, D. Johrendt

Phys. Status Solidi B 254, 1600157 (2017)

153) Defect states in LiFeAs as seen by low-temperature scanning tunneling microscopy and spectroscopy

R. Schlegel, P.K. Nag, D. Baumann, R. Beck, S. Wurmehl, B. Büchner, C. Hess

Phys. Status Solidi B 254, 1600159 (2017)

152) Spin reorientation transition in Na-doped BaFe₂As₂ studied by single-crystal neutron diffraction

F. Waßer, S. Wurmehl, S. Aswartham, Y. Sidis, J. T. Park, A. Schneidewind, B. Büchner,
M. Braden

Phys. Status Solidi B 254, 1600181 (2017)

151) Superconductivity in Ni-Doped Ba-Fe-As Thin Films Prepared From Single-Crystal Targets Using PLD

S. Richter, S. Aswartham, A. Pukenas, V. Grinenko, S. Wurmehl, W. Skrotzki, B. Büchner,
K. Nielsch, R. Hühne

IEEE Transact. Appl. Supercond. 27, 7300304 (2017)

2016 (#19)

150) Role of magnetic dopants in the phase diagram of Sm 1111 pnictides: The case of Mn

G. Lamura, T. Shiroka, S. Bordignon, S. Sanna, M. Moroni, R. De Renzi, P. Carretta,
P. K. Biswas, F. Caglieris, M. Putti, S. Wurmehl, S. J. Singh, J. Shimoyama,
M. N. Gastiasoro, B. M. Andersen

Phys. Rev. B 94, 214517 (2016)

149) Combined resistivity and Hall effect study on NaFe_1-xRh_xAs single crystals

F. Steckel, F. Caglieris, R. Beck, M. Roslova, D. Bombor, I. Morozov, S. Wurmehl,
B. Büchner, C. Hess

Phys. Rev. B 94, 184514 (2016)

148) Noncollinear antiferromagnetism of coupled spins and pseudospins in the double perovskite La₂CuIrO₆

K. Manna, R. Sarkar, S. Fuchs, Y. A. Onykiienko, A. K. Bera, G. Aslan Cansever,
S. Kamusella, A. Maljuk, C. G. F. Blum, L. T. Corredor, A. U. B. Wolter, S. M. Yusuf,
M. Frontzek, L. Keller, M. Iakovleva, E. Vavilova, H.-J. Grafe, V. Kataev, H.-H. Klauss,
D. S. Inosov, S. Wurmehl, B. Büchner

Phys. Rev. B 94, 144437 (2016)

147) Magnetotransport and de Haas-van Alphen measurements in the type-II Weyl semimetal TaIrTe₄

S. Khim, K. Koepernik, D. V. Efremov, J. Klotz, T. Förster, J. Wosnitza, M. I. Sturza,
S. Wurmehl, C. Hess, J. van den Brink, B. Büchner

Phys. Rev. B 94, 165145 (2016)

146) Physical properties optimization of polycrystalline LiFeAs

S.J. Singh, U. Gräfe, R. Beck, A.U.B. Wolter, H.-J. Grafe, C. Hess, S. Wurmehl, B. Büchner

Physica C 529, 8 (2016)

145) Cantilever detected ferromagnetic resonance in thin Fe₅₀Ni₅₀, Co₂FeAl_0.5Si_0.5 and Sr₂FeMoO₆ films using a double modulation technique

A. Alfonsov, E. Ohmichi, P. Leksin, A. Omar, H. Wang, S. Wurmehl, F. Yang, H. Ohta

J. Mag. Res. 270, 183 (2016)

144) Spin-orbit coupling control of anisotropy, ground state and frustration in 5d² Sr₂MgOsO₆

R. Morrow, A. E. Taylor, D. J. Singh, J. Xiong, S. Rodan, A. U. B. Wolter, S. Wurmehl,
B. Büchner, M. B. Stone, A. I. Kolesnikov, Adam A. Aczel, A. D. Christianson,
P. M. Woodward

Scientific Reports 6,  32462 (2016)

143) Single crystal growth of spin-ladder compound La₈Cu₇O₁₉ by the travelling-solvent floating zone method

A. Mohan, S. Singh, S. Partzsch, M. Zwiebler, J. Geck, S. Wurmehl, B. Büchner, C. Hess

J. Cryst. Growth 448, 21 (2016)

142) Competing effects of Mn and Y doping on the low-energy excitations and phase diagram of La_1-yY_yFe_1-xMnxAsO_0.89F_0.11 iron-based superconductors

M. Moroni, S. Sanna, G. Lamura, T. Shiroka, R. De Renzi, R. Kappenberger, M. A. Afrassa, S. Wurmehl, A. U. B. Wolter, B. Büchner, P. Carretta

Phys. Rev. B 94, 054508 (2016)

141) Spatial competition of the ground states in 1111 iron pnictides

G. Lang, L. Veyrat, U. Gräfe, F. Hammerath, D. Paar, G. Behr, S. Wurmehl, H.-J. Grafe

Phys. Rev. B 94, 014514 (2016)

140) Spin Dynamics and Ground State of the Frustrated Diamond Lattice Magnet CoAl₂O₄ as seen by ²⁷Al NMR

M. F. Iakovleva, E. L. Vavilova, H.-J. Grafe, A. Maljuk, S. Wurmehl, B. Büchner, V. Kataev

Appl. Mag. Res. 47, 727 (2016)

139) Hall-plot of the phase diagram for Ba(Fe_1-xCo_x)₂As₂

K. Iida, V. Grinenko, F. Kurth, A. Ichinose, I. Tsukada, E. Ahrens, A. Pukenas, P. Chekhonin, W. Skrotzki, A. Teresiak, R. Hühne, S. Aswartham, S. Wurmehl, I. Mönch, M. Erbe, J. Hänisch, B. Holzapfel, S.-L. Drechsler, D. V. Efremov

Scientific Reports 6,  28390 (2016)

138) Two distinct superconducting phases in LiFeAs

P. K. Nag, R. Schlegel, D. Baumann, H.-J. Grafe, R. Beck, S. Wurmehl, B. Büchner, C. Hess

Scientific Reports 6, 27926 (2016)

137) Unusual magnetotransport properties in a FeAs single crystal

S. Khim, M. Gillig, R. Klingeler, S. Wurmehl, B. Büchner, C. Hess

Phys. Rev. B 93, 205129 (2016)

136)Tailored nanoparticles and wires of Sn, Ge and Pb inside carbon nanotubes

M. Haft, M. Grönke, M. Gellesch, S. Wurmehl, B. Büchner, M. Mertig, S. Hampel

Carbon 101, 352 (2016)

135) Acoustic signatures of the phases and phase transitions in Yb₂Ti₂O₇

S. Bhattacharjee, S. Erfanifam, E. L. Green, M. Naumann, Z. Wang, S. Granovsky, M. Doerr, J. Wosnitza, A. A. Zvyagin, R. Moessner, A. Maljuk, S. Wurmehl, B. Büchner, S. Zherlitsyn

Phys. Rev. B 93, 144412 (2016)

134) Direct observation of spin-orbit coupling in iron-based superconductors

S. V. Borisenko, D. V. Evtushinsky,  Z.-H. Liu, I. Morozov, R. Kappenberger, S. Wurmehl,
B. Büchner, A. N. Yaresko, T. K. Kim, M. Hoesch, T. Wolf, N. D. Zhigadlo

Nature Physics 12, 311 (2016)

133)Weak-coupling superconductivity in a strongly correlated iron pnictide

A. Charnukha, K. W. Post, S. Thirupathaiah, D. Pröpper, S. Wurmehl, M. Roslova,
I. Morozov, B. Büchner, A. N. Yaresko, A. V. Boris, S. V. Borisenko,  D. N. Basov

Scientific Reports 6, 18620 (2016)

132)  Ba₂YIrO₆: A cubic double perovskite material with Ir⁵⁺ ions

T. Dey, A. Maljuk, D. V. Efremov, O. Kataeva, S. Gass, C. G. F. Blum, F. Steckel, D. Gruner, T. Ritschel, A. U. B. Wolter, J. Geck, C. Hess, K. Koepernik, J. van den Brink, S. Wurmehl,
B. Büchner

Phys. Rev. B 93, 014434 (2016)

2015 (#17)

131) Non-Fermi-liquid scattering rates and anomalous band dispersion in ferropnictides

J. Fink, A. Charnukha, E. D. L. Rienks, Z. H. Liu, S. Thirupathaiah, I. Avigo, F. Roth,
H. S. Jeevan, P. Gegenwart, M. Roslova, I. Morozov, S. Wurmehl, U. Bovensiepen,
S. Borisenko, M. Vojta, B. Büchner

Phys. Rev. B 92, 201106(R) (2015)

130) Interface control by homoepitaxial growth in pulsed laser deposited iron chalcogenide thin films

S. Molatta, S. Haindl, S. Trommler, M. Schulze, S. Wurmehl, R. Hühne

Scientific Reports 5, 16334 (2015)

129) Coexistence of superconductivity and magnetism in Ca_1−xNa_xFe₂As₂: Universal suppression of the magnetic order parameter in 122 iron pnictides

P. Materne, S. Kamusella, R. Sarkar, T. Goltz, J. Spehling, H. Maeter, L. Harnagea, S. Wurmehl, B. Büchner, H. Luetkens, C. Timm, H.-H. Klauss

Phys. Rev. B 92, 134511 (2015)

128) Structural Inhomogeneities in FeTe_0.6Se_0.4: Relation to Superconductivity

K. Prokes, M. Schulze, S. Hartwig, N. Schäfer, S. Landsgesell, C.G.F. Blum, D. Abou-Ras, M. Y. Hacisalihoglu, E. Ressouche, B. Ouladdiaf, B. Büchner, S. Wurmehl

J. Cryst. Growth 432, 95 (2015)

127) Enhancement of low-frequency fluctuations and superconductivity breakdown in
Mn-doped La_1−yY_yFeAsO_0.89F_0.11 superconductors

F. Hammerath, M. Moroni, L. Bossoni, S. Sanna, R. Kappenberger, S. Wurmehl,
A. U. B. Wolter, M. A. Afrassa, Y. Kobayashi, M. Sato, B. Büchner, P. Carretta

Phys. Rev. B 92, 020505(R) (2015)

126) NMR investigation of boron impurities in refined metallurgical grade Silicon

H. Grafe, W. Löser S. Schmitz, M. Sakaliyska, S. Wurmehl, S. Eisert, B. Reichenbach,
J. Acker, A. Rietig, J. Ducke, T. Müller

Phys. Stat. Solidi A  212, 2031 (2015)

125) Mutual Independence of Critical Temperature and Superfluid Density under Pressure
in Optimally Electron-Doped Superconducting LaFeAsO_1−xF_x

G. Prando, Th. Hartmann, W. Schottenhamel, Z. Guguchia, S. Sanna, F. Ahn, I. Nekrasov, C. G. F. Blum, A. U. B. Wolter, S. Wurmehl, R. Khasanov, I. Eremin, B. Büchner

Phys. Rev. Lett. 114, 247004 (2015)

124) Crystal growth and electronic phase diagram of 4d−doped Na_1−δFe_1−xRh_xAs in comparison to 3d−doped Na_1−δFe_1−xCo_xAs

F. Steckel, M. Roslova, R. Beck, I. Morozov, S. Aswartham, D. Evtushinsky, C. G. F. Blum, M. Abdel-Hafiez, D. Bombor, J. Maletz, S. Borisenko,  A. V. Shevelkov, 
A. U. B. Wolter, C. Hess, S. Wurmehl, B. Büchner

Phys. Rev. B 91, 184516 (2015)

123)Ground state and low-energy magnetic dynamics in the frustrated magnet CoAl₂O₄ as revealed by local spin probes

M. Iakovleva, E. Vavilova, H.-J. Grafe, S. Zimmermann, A. Alfonsov, H. Luetkens,
H.-H. Klauss, A. Maljuk, S. Wurmehl, B. Büchner, V. Kataev

Phys. Rev. B 91, 144419 (2015)

122) Impact of local order and stoichiometry on the ultrafast magnetization dynamics of Heusler compounds

D. Steil, O. Schmitt, R. Fetzer, T. Kubota, H. Naganuma, M. Oogane, Y. Ando, S. Rodan, C.G.F. Blum, B. Balke, S. Wurmehl, M. Aeschlimann, M. Cinchetti

J. Phys. D: Appl. Phys. 48, 164016 (2015)

121) Spin reorientation in Ba_0.65Na_0.35Fe₂As₂ studied by single-crystal neutron diffraction

F. Waßer, A. Schneidewind, Y. Sidis, S. Wurmehl, S. Aswartham, B. Büchner, M. Braden

Phys. Rev. B 91, 060505(R) (2015)

120)  Flux growth and characterization of Sr₂NiWO₆ single crystals

C.G.F. Blum, A. Holcombe, M. Gellesch, M.I. Sturza, S. Rodan, R. Morrow, A. Maljuk,
P. Woodward, P. Morris, A.U.B. Wolter, B. Büchner, S. Wurmehl

J. Cryst. Growth 421, 39 (2015)

119) Local magnetism and structural properties of Heusler Ni₂MnGa alloys

M. Belesi, L. Giebeler, C. G. F. Blum, U. K. Rößler, B. Büchner, S. Wurmehl

Phys. Rev. B 91, 134415 (2015)

118) Characterization of doped Na(Fe_1−xT_x)As single crystals with T = Pd, Ni, Cr, and Mn

F. Steckel, R. Beck, M. Roslova,  M. Abdel-Hafiez, A. U. B. Wolter, I. Morozov, S. Wurmehl, C. Hess,  B. Büchner

J. Supercond. Nov. Magn. 28, 1123 (2015)

117) Nuclear magnetic resonance study of thin Co₂FeAl_0.5Si_0.5 Heusler films with varying thickness

A. Alfonsov, B. Peters, F. Y. Yang, B. Büchner, S. Wurmehl

Phys. Rev. B 91, 064421 (2015)

116) Granular behavior observed in the polycrystalline superconducting LiFeAs

S. J. Singh, R. Beck, S. Wurmehl, C. Hess, B. Büchner

Supercond. Sci. Technol. 28, 025006 (2015)

2014 (#21)

115) NMR spectroscopy applied to Heusler thin films-a review (invited)

S. Wurmehl, J.T. Kohlhepp

Spin 4, 1440019 (2014)

114) Magnetic order and spin dynamics in La₂O₂Fe₂OSe₂ probed by ⁵⁷Fe Mössbauer, ¹³⁹La NMR, and muon-spin relaxation spectroscopy

M. Günther, S. Kamusella, R. Sarkar, T. Goltz, H. Luetkens, G. Pascua, S.-H. Do, K.-Y. Choi, H. D. Zhou, C. G. F. Blum, S. Wurmehl, B. Büchner, H.-H. Klauss

Phys. Rev. B 90, 184408 (2014)

113)Fine structure of the incommensurate antiferromagnetic fluctuations in single-crystalline LiFeAs studied by inelastic neutron scattering

N. Qureshi, P. Steffens, D. Lamago, Y. Sidis, O. Sobolev, R. A. Ewings, L. Harnagea,
S. Wurmehl, B. Büchner, M. Braden

Phys. Rev. B 90, 144503 (2014)

112) Identical spin fluctuations in Cu- and Co-doped BaFe₂As₂ independent of electron doping

H.-J. Grafe, U. Gräfe, A. P. Dioguardi, N. J. Curro, S. Aswartham, S. Wurmehl, B. Büchner

Phys. Rev. B 90, 0945519 (2014)

111) Spin density wave order and fluctuations in Mn₃Si : A transport study

F. Steckel, S. Rodan, R. Hermann, C. G. F. Blum, S. Wurmehl, Bernd Büchner, C. Hess

Phys. Rev. B 90, 134411 (2014)

110) Phonon anomalies, orbital-ordering and electronic raman scattering in iron-pnictide Ca(Fe_0.97Co_0.03)₂As₂: temperature-dependent Raman study

P. Kumar, D.V.S. Muthu, L. Harnagea, S. Wurmehl, B. Büchner, A. K. Sood

J. Phys. Condend. Matter 26, 305403 (2014)

109) Superconducting properties of K_1−xNa_xFe₂As₂ under pressure

V. Grinenko, W. Schottenhamel, A. U. B. Wolter, D. V. Efremov, S.-L. Drechsler, S. Aswartham, M. Kumar, S. Wurmehl,
M. Roslova, I. V. Morozov, B. Holzapfel, B. Büchner, E. Ahrens, S. I. Troyanov, S. Köhler, E. Gati, S. Knöner, N. H. Hoang, M. Lang, F. Ricci, G. Profeta

Phys. Rev. B 90, 094511 (2014)

108) Electronic properties of Co₂FeSi investigated by X-ray magnetic linear dichroism

M. Emmel, A. Alfonsov, D. Legut, A. Kehlberger, E. Vilanova, I.P. Krug, D.M. Gottlob,
M. Belesi, B. Büchner, M. Kläui, P.M. Oppeneer, S. Wurmehl, H.J. Elmers, G. Jakob

J. Magn. Magn. Mater. 368, 364 (2014)

107)Josephson effect and Andreev reflection in Ba_1–xNa_xFe₂As₂ (x = 0.25 and 0.35) point contacts

V.V. Fisun, O.P. Balkashin, O.E. Kvitnitskaya, I.A. Korovkin, N.V. Gamayunova,
S. Aswartham, S. Wurmehl, Yu.G. Naidyuk

Low Temperature Physics 40, (2014)

106) Single 20 meV boson mode in KFe₂As₂ detected by point-contact spectroscopy

Yu. G. Naidyuk, O.E. Kvitnitskaya, N.V. Gamayunova, L. Boeri, S. Aswartham, S. Wurmehl, D.V. Efremov, G. Fuchs, S.-L. Drechsler

Phys. Rev. B 90, 094505 (2014)

105) Low-temperature properties of single-crystal CrB₂

A. Bauer, A. Regnat, C. G. F. Blum, S. Gottlieb-Schönmeyer, B. Pedersen,
M. Meven, S. Wurmehl, J. Kunes,  C. Pfleiderer

Phys. Rev. B 90, 064414 (2014)

104) Specific heat of Ca_0.32Na_0.68Fe₂As₂ single crystals: Unconventional s(+/-) multiband superconductivity with intermediate repulsive interband coupling and sizable attractive intraband couplings

S. Johnston, M. Abdel-Hafiez, L. Harnagea, V. Grinenko, D. Bombor, Y. Krupskaya, C. Hess, S. Wurmehl, A. U. B. Wolter, B. Büchner, H. Rosner, S.-L. Drechsler

Phys. Rev. B 89, 134507 (2014)

103)Growth of single crystalline delafossite LaCuO₂ by the travelling-solvent floating zone method

A. Mohan, B. Büchner, S. Wurmehl, C. Hess

J. Cryst. Growth 402, 304 (2014)

102) Signatures of superconducting and pseudogap phases in ultrafast transient reflectivity of Ca(Fe_0.927Co_0.073)₂As₂

S. Kumar, L. Harnagea, S. Wurmehl, B. Büchner, A. K. Sood

EPL 105, 47004 (2014)

101) Specific heat of K_0.71Na_0.29Fe₂As₂ at very low temperatures

A. Reifenberger, M. Hempel, P. Vogt, S. Aswartham,  M. Abdel-Hafiez, V. Grinenko,
S. Wurmehl, S.-L. Drechsler, A. Fleischmann, C. Enss, R. Klingeler

J. Low. Temp. Phys. 175, 155 (2014)

100) Exploring point-contact spectra of Ba_1-xNa_xFe₂As₂ in the normal and superconducting states

Yu. G. Naidyuk, O. E. Kvitnitskaya, S. Aswartham, G. Fuchs, K. Nenkov, S. Wurmehl

Phys. Rev. B 89, 104512 (2014)

99) Strong electron pairing at the iron 3d_{xz, yz} orbitals in hole-doped BaFe₂As₂ superconductors revealed by angle-resolved photoemission spectroscopy

D. V. Evtushinsky, V. B. Zabolotnyy, T. K. Kim, A. A. Kordyuk, A. N. Yaresko, J. Maletz,
S. Aswartham, S. Wurmehl, A. V. Boris, D. L. Sun, C. T. Lin, B. Shen, H. H. Wen,
A. Varykhalov, R. Follath, B. Büchner, S. V. Borisenko

Phys. Rev. B 89, 064514  (2014)

98) Spin susceptibility in superconducting LiFeAs studied by polarized neutron diffraction

J. Brand, A. Stunault, S. Wurmehl, L. Harnagea, B. Büchner, M. Meven, M. Braden

Phys. Rev. B 89, 045141 (2014)

97) Superconducting specific-heat jump ΔC_el∝ Tcβ (β≈2) for K_1−xNa_xFe₂As₂

V. Grinenko, D. V. Efremov, S.-L. Drechsler, S. Aswartham, D. Gruner, M. Roslova,
I. Morozov, K. Nenkov, S. Wurmehl, A. U. B. Wolter, B. Holzapfel, B. Büchner

Phys. Rev. B 89, 060504(R) (2014)

96) Effect of annealing on spinodally decomposed Co₂CrAl grown via floating zone technique

A. Omar, C.G.F. Blum, W. Löser, B. Büchner, S. Wurmehl

J. Cryst. Growth 401, 617 (2014)

95) Growth, characterization, and magnetic properties of a Li(Mn,Ni)PO₄ single crystal

K. Wang, A. Maljuk, C.G.F. Blum, T. Kolb, C. Jähne, C. Neef, H.-J. Grafe, L. Giebeler,
H. Wadepohl, H.-P. Meyer, S. Wurmehl, R. Klingeler

J. Cryst. Growth 386, 16 (2014)

2013 (#27)

94) Independent Ordering of Two Interpenetrating Magnetic Sublattices in the Double Perovskite Sr₂CoOsO₆

R. Morrow , R. Mishra , O. D. Restrepo , M. R. Ball , W. Windl, S. Wurmehl, U. Stockert,
B. Büchner, P. M. Woodward

J. Am. Chem. Soc. 135, 18824 (2013)

93) de Haas-van Alphen effect and Fermi surface properties of single-crystal CrB₂

M. Brasse, L. Chioncel, J. Kuneš, A. Bauer, A. Regnat, C. G. F. Blum, S. Wurmehl,
C. Pfleiderer, M. A. Wilde, D. Grundler

Phys. Rev. B 88, 155138 (2013)

92) Diversity of Microstructural Phenomena in Superconducting and Non-superconducting Rb_xFe_2–ySe₂: A Transmission Electron Microscopy Study at the Atomic Scale

M. V. Roslova, O. I. Lebedev, I. V. Morozov, S. Aswartham, S. Wurmehl, B. Büchner,
A. V. Shevelkov

Inorg. Chem 52, 14419 (2013)

91) Evidence for a vortex-glass transition in superconducting Ba(Fe_0.9Co_0.1)₂As₂

G. Prando, R. Giraud, S. Aswartham, O. Vakaliuk, M. Abdel-Hafiez, C. Hess, S. Wurmehl,
A. U. B. Wolter, B. Büchner

J. Phys.: Condens. Matter 25, 505701 (2013)

90) Flux dynamics and avalanches in the 122 pnictide superconductor Ba_0.65Na_0.35Fe₂As₂

A. K Pramanik, S. Aswartham, A. U. B. Wolter, S. Wurmehl, V. Kataev, B. Büchner

J. Phys.: Condens. Matter 25, 495701 (2013)

89)Epitaxial films of Heusler compound Co₂FeAl_0.5Si_0.5 with high crystalline quality grown by off-axis sputtering

B. Peters, A. Alfonsov, C. G. F. Blum, S. J. Hageman, P. M. Woodward, S. Wurmehl,
B. Büchner, F. Y. Yang

Appl. Phys. Lett. 103, 162404 (2013)

88) ⁵⁵Mn NMR study of quaternary half-metallic ferromagnetic Co₂Mn_1−xFe_xSi Heusler compounds

S. Wurmehl, A. Alfonsov, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans, M. Wojcik,
B. Balke, V. Ksenofontov, C. G. F. Blum, B. Büchner

Phys. Rev. B 88, 134424 (2013)

87) Peculiarities of anisotropic electrical resistivity in Lu₂PdSi₃ single crystals

C. Cao, C. G. F. Blum, T. Ritschel, S. Rodan, L. Giebeler, D. Bombor, S. Wurmehl, W. Löser

Cryst. Eng. Comm. 15, 9052 (2013)

86)  Progressive slowing down of spin fluctuations in underdoped LaFeAsO_1−xF_x

F. Hammerath, U. Gräfe, T. Kühne, H. Kühne, P. L. Kuhns, A. P. Reyes, G. Lang,
S. Wurmehl, B. Büchner, P. Carretta, H.-J. Grafe

Phys. Rev. B 88, 104503 (2013)

85)Local structure and hyperfine interactions of ⁵⁷Fe in NaFeAs studied by Mössbauer spectroscopy

I. Presniakov, I. Morozov, A. Sobolev, M. Roslova, A. Boltalin, V. Son, O. Volkova,
A. Vasiliev, S. Wurmehl, B. Büchner

J. Phys.: Condens. Matter 25, 346003 (2013)

84) On the half-metallicity of Co₂FeSi Heusler alloy: Point-contact Andreev reflection spectroscopy and ab initio study

L. Makinistian, M. M. Faiz, R. P. Panguluri, B. Balke, S. Wurmehl, C. Felser, E. A. Albanesi, A. G. Petukhov, B. Nadgorny

Phys. Rev. B 87, 220402(R) (2013)

83) Phase dynamics and growth of Co₂Cr_1−xFe_xAl Heusler compounds: A key to understand their anomalous physical properties

A. Omar, M. Dimitrakopoulou, C. G. F. Blum, H. Wendrock, S. Rodan, S. Hampel, W. Löser, B. Büchner, S. Wurmehl

Cryst. Growth & Design 13, 3925 (2013)

82) Facile Nanotube-Assisted Synthesis of Ternary Intermetallic Nanocrystals of the Ferromagnetic Heusler Phase Co₂FeGa

M. Gellesch, M. Dimitrakopoulou, M. Scholz, C. G.F. Blum, M. Schulze, J. van den Brink,
S. Hampel, S. Wurmehl, B.Büchner

Cryst. Growth & Design, 13, 2707 (2013)

81) NMR study of the impact of annealing on structural evolution of epitaxial Co₂MnSi Heusler films

S. Rodan, A. Alfonsov, M. E. Belesi, F. Ferraro, J. T. Kohlhepp, H. J. M. Swagten,
B. Koopmans, Y. Sakuraba, S. Bosu, K. Takanashi, B. Büchner, S. Wurmehl,

Appl. Phys. Lett. 102, 242404 (2013)

80) Evidence of d-wave superconductivity in K_1-xNa_xFe₂As₂ (x=0,0.1) single crystals from low-temperature specific-heat measurements

M. Abdel-Hafiez, V. Grinenko, S. Aswartham, I. Morozov, M. Roslova, O. Vakaliuk,
S. Johnston, D. V. Efremov, J. van den Brink, H. Rosner, M. Kumar, C. Hess, S. Wurmehl,
A. U. B. Wolter, B. Büchner, E. L. Green, J. Wosnitza, P. Vogt, A. Reifenberger, C. Enss,
M. Hempel, R. Klingeler, S.-L. Drechsler

Phys. Rev. B 87, 180507(R) (2013)

79) Role of in-plane and out-of-plane dilution in CeFeAsO: Charge doping versus disorder

G. Prando, O. Vakaliuk, S. Sanna, G. Lamura, T. Shiroka, P. Bonfà, P. Carretta, R. De Renzi, H.-H. Klauss, C. G. F. Blum, S. Wurmehl, C. Hess, B. Büchner

Phys. Rev. B 87, 174519 (2013)

78)Observation of charge accumulation and onsite Coulomb repulsion at transition metal impurities in the iron pnictides

R. Kraus, V. Bisogni, L. Harnagea, S. Aswartham, S. Wurmehl, G. Levy, I. S. Elfimov,
B. Büchner, G. A. Sawatzky, J. Geck

Phys. Rev. B 87, 134516 (2013)

77)Ultrafast quasiparticle relaxation dynamics in superconducting iron pnictide Ca(Fe_0.944Co_0.056)₂As₂

S. Kumar, L. Harnagea, S. Wurmehl, B. Büchner, A. K. Sood

Solid State Comm. 160, 8 (2013)

76)Gap-Dependent Quasiparticle Dynamics and Coherent Acoustic Phonons in CaFe₂As₂ across Spin Density Wave Phase Transition

S. Kumar, L. Harnagea, S. Wurmehl, B. Büchner, A. K. Sood

J. Phys. Soc. Jpn. 82, 044715 (2013)

75)  Anomalous superconducting state in LiFeAs implied by the As-75 Knight shift measurement

S.-H. Baek, L. Harnagea, S. Wurmehl, B. Büchner, H.-J. Grafe

J. Phys.: Condens. Matter 25, 162204 (2013)

74) Microwave absorption study of pinning regimes in Ba(Fe_1-xCo_x)₂As₂ single crystals

Y. Talanov, N. Beisengulov, G. Kornilov, T. Shaposhnikova, E. Vavilova, C. Nacke,
S. Wurmehl, N. Panarina, C. Hess, V. Kataev, B. Büchner

Supercond. Sci. Technol. 26, 045015 (2013)

73)  Intrinsic pinning and the critical current scaling of clean epitaxial Fe(Se, Te) thin films

K. Iida, J. Hänisch, E. Reich, F. Kurth, R. Hühne, L. Schultz, B. Holzapfel, M.Hanawa,
I. Tsukada, M. Schulze, S. Aswartham, S. Wurmehl, B. Büchner

Phys. Rev. B 87, 104510 (2013)

72) Electronic band structure and momentum dependence of the superconducting gap in
Ca_1-xNa_xFe₂As₂ from angle-resolved photoemission spectroscopy

D. V. Evtushinsky, V. B. Zabolotnyy, L. Harnagea, A. N. Yaresko, S. Thirupathaiah,
A. A. Kordyuk, J. Maletz, S. Aswartham, S. Wurmehl, E. Rienks, R. Follath, B. Büchner,
S. V. Borisenko

Phys. Rev. B 87, 094501 (2013)

71) Disordered magnetism in superconducting KFe₂As₂ single crystals

V. Grinenko, S.-L. Drechsler, M. Abdel-Hafiez, S. Aswartham, A. U. B. Wolter, S. Wurmehl, C. Hess, K. Nenkov, G. Fuchs, D. V. Efremov, B. Holzapfel, J. van den Brink, B. Büchner

Physica status solidi (b) 250, 593 (2013)

70) Half-Metallic ferromagnetism with unexpectedly small spin splitting in the Heusler compound Co₂FeSi

D. Bombor, C. G. F. Blum, O. Volkonskiy, S. Rodan, S. Wurmehl, C. Hess, B. Büchner

Phys. Rev. Lett. 110, 066601 (2013)

69) Single crystal growth of antiferromagnetic Mn₃Si by a two-phase RF floating-zone method

R. Hermann, H. Wendrock, S. Rodan, U.K. Rößler, C.G.F. Blum, S. Wurmehl, B. Büchner

J. Cryst. Growth 363, 1 (2013)

68) Interband Quasiparticle Scattering in Superconducting LiFeAs Reconciles Photoemission and Tunneling Measurements

C. Hess, S. Sykora, T. Hänke, R. Schlegel, D. Baumann, V. B. Zabolotnyy, L. Harnagea,
S. Wurmehl, J. van den Brink, B. Büchner

Phys. Rev. Lett. 110, 017006 (2013)

2012 (#16)

67) Investigation of LiFeAs by means of "break-junction" technique

S. A. Kuzmichev, T. E. Shanygina, I. V. Morozov, A. I. Boltalin, M. V. Roslova, S. Wurmehl, B. Büchner

JETP Letters 95, 537 (2012)

66) Acoustic and optical phonon dynamics from femtosecond time-resolved optical spectroscopy of the superconducting iron pnictide Ca(Fe_0.944Co_0.056)₂As₂

S. Kumar, L. Harnagea, S. Wurmehl, B. Büchner, A. K. Sood

EPL 100, 57007 (2012)

65) Weak-coupling superconductivity in electron-doped NaFe_0.95Co_0.05As revealed by ARPES

S. Thirupathaiah, D. V. Evtushinsky, J. Maletz, V. B. Zabolotnyy, A. A. Kordyuk, T. K. Kim,
S. Wurmehl, M. Roslova, I. Morozov, B. Büchner, S. V. Borisenko

Phys. Rev. B 86, 214508 (2012)

64) Incommensurate magnetic fluctuations and Fermi surface topology in LiFeAs

J. Knolle, V. B. Zabolotnyy, I. Eremin, S. V. Borisenko, N. Qureshi, M. Braden,
D. V. Evtushinsky, T. K. Kim, A. A. Kordyuk, S. Sykora, Ch. Hess, I. V. Morozov, S. Wurmehl, R. Moessner, B. Büchner

Phys. Rev. B 86, 174519 (2012)

63) Pr magnetism and its interplay with the Fe spin-density wave in PrFeAsO_1-xF_x (x=0,0.15)

U. Stockert, N. Leps, L. Wang, G. Behr, S. Wurmehl, B. Büchner, R. Klingeler

Phys. Rev. B 86, 144407 (2012)

62) Probing the Role of Co Substitution in the Electronic Structure of Iron Pnictides

G. Levy, R. Sutarto, D. Chevrier, T. Regier, R. Blyth, J. Geck, S. Wurmehl, L. Harnagea,
H. Wadati, T. Mizokawa, I. S. Elfimov, A. Damascelli, G. A. Sawatzky

Phys. Rev. Lett. 109, 077001 (2012)

61) Local magnetic anisotropy in BaFe₂As₂: A polarized inelastic neutron scattering study

N. Qureshi, P. Steffens, S. Wurmehl, S. Aswartham, B. Büchner, M. Braden

Phys. Rev. B 86, 060410(R) (2012)

60) Probing the unconventional superconducting state of LiFeAs by quasiparticle interference

T. Hänke, S. Sykora, R. Schlegel, D. Baumann, L. Harnagea, S. Wurmehl, M. Daghofer,
B. Büchner, J. van den Brink, C. Hess

Phys. Rev. Lett. 108, 127001 (2012)

59) Specific heat and upper critical fields in KFe₂As₂ single crystals

M. Abdel-Hafiez, S. Aswartham, S. Wurmehl, V. Grinenko, C. Hess, S.-L. Drechsler,
S. Johnston, A.U.B. Wolter, B. Büchner, H. Rosner, L. Boeri

Phys. Rev. B 85, 134533 (2012)

58) Gd³⁺ electron spin resonance spectroscopy on LaO_1-xF_xFeAs superconductors

A. Alfonsov, F. Muranyi, N. Leps, R. Klingeler, A. Kondrat, C. Hess, S. Wurmehl, A. Koefiler, G. Behr, V. Kataev, B. Büchner

J. Ex. Theo. Phys. 114, 662 (2012)

57) ⁷⁵As NMR-NQR study in superconducting LiFeAs

S.-H. Baek, H.-J. Grafe, F. Hammerath, M. Fuchs, C. Rudisch, L. Harnagea, S. Aswartham, S. Wurmehl, J. van den Brink, B. Büchner

Europ. Phys. J. B 85, 159 (2012)

56) ac susceptibility investigation of vortex dynamics in nearly optimally doped RFeAsO_1-xF_x superconductors (R = La, Ce, Sm)

G. Prando, P. Carretta, R. De Renzi, S. Sanna, H.-J. Grafe, S. Wurmehl, B. Büchner

Phys. Rev. B 85, 14452 (2012)

55) Inelastic neutron-scattering measurements of incommensurate magnetic excitations on superconducting LiFeAs single crystals

N. Qureshi, P. Steffens, Y. Drees, A.C. Komarek, D. Lamago, Y. Sidis, L. Harnagea,
H.-J. Grafe, S. Wurmehl, B. Büchner, M. Braden

Phys. Rev. Lett. 108, 117001 (2012)

54) Hole doping in BaFe₂As₂: The case of Ba_1-xNa_xFe₂As₂ single crystals

S. Aswartham, M. Abdel-Hafiez, D. Bombor, M. Kumar, A.U.B. Wolter, C. Hess,
D.V. Evtushinsky, V.B. Zabolotnyy, A.A. Kordyuk, T.K. Kim, S.V. Borisenko, G. Behr,
B. Büchner, S. Wurmehl

Phys. Rev. B 85, 22452 (2012)

53) Collapsed tetragonal phase in Ca(Fe_1-xCo_x)₂As₂ stabilized by pressure: Structural studies using single-crystal neutron diffraction

K. Prokeš, B. Ouladdiaf, L. Harnagea, S. Wurmehl, D. N. Argyriou, and B. Büchner

Phys. Rev. B 85, 104523 (2012)

52) ⁵⁹Co nuclear magnetic resonance study of the local distribution of atoms in the Heusler compound Co₂FeAl_0.5Si_0.5

S. Wurmehl, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans

J. Appl. Phys. 111, 043903 (2012)

2011 (#16)

51) Effect of Co substitution on the magnetic order in Ca(Fe_1-xCo_x)₂As₂ single crystals studied by neutron diffraction

K. Prokeš, S. Mat’aš, L. Harnagea, S. Singh, S. Wurmehl, D. N. Argyriou, B. Büchner

Phys. Rev. B 83, 104414 (2011)

50) Local formation of a Heusler structure in CoFeAl alloys

S. Wurmehl, P.J. Jacobs, J.T. Kohlhepp, H.J.M. Swagten, B. Koopmans, S. Maat, M.J. Carey, J.R. Childress

Appl. Phys. Lett. 98, 12506 (2011)

49) Single crystal growth and physical properties of superconducting ferro-pnictides Ba(Fe,Co)₂As₂ grown using self-flux and Bridgman techniques

S. Aswartham, C. Nacke, G. Friemel, N. Leps, S. Wurmehl, N. Wizent, C. Hess, R. Klingeler, G. Behr, S. Singh, B. Büchner

J. Cryst. Growth 314, 341 (2011)

48) High-field electron spin resonance spectroscopy study of GdFeAsO_1-xF_x superconductors

A. Alfonsov, F. Muranyi, V. Kataev, G. Lang, N. Leps, L. Wang, R. Klingeler, A. Kondrat,
C. Hess, S. Wurmehl, A. Koehler, G. Behr, S. Hampel, M. Deutschmann, S. Katrych,
N.D. Zhigadlo, Z. Bukowski, J. Karpinski, B. Büchner

Phys. Rev. B 83, 94526 (2011)

47) Phase diagram of the iron arsenide superconductors Ca(Fe_1-xCo_x)₂As₂

L. Harnagea, S. Singh, G. Friemel, N. Leps, D. Bombor, M. Abdel-Hafiez, A.U.B. Wolter,
C. Hess, R. Klingeler, G. Behr, S. Wurmehl, B. Büchner

Phys. Rev. B 83, 94523 (2011)

46) Raman evidence for the superconducting gap and spin-phonon coupling in the superconductor Ca(Fe_0.95Co_0.05)₂As₂

P. Kumar, A. Bera, D.V.S. Muthu, A. Kumar, U.V. Waghmare, L. Harnagea, C. Hess,
S. Wurmehl, S. Singh, B. Büchner, A.K. Sood

J. Phys. Condens. Matter 23, 255403 (2011)

45) Specific heat and angle-resolved photoemission spectroscopy study of the superconducting gaps in LiFeAs

U. Stockert, M. Abdel-Hafiez, D.V. Evtushinsky, V.B. Zabolotnyy, A.U.B. Wolter, S. Wurmehl, I. Morozov, R. Klingeler, S.V. Borisenko, B. Büchner

Phys. Rev. B 83, 224512 (2011)

44) Resistivity and Hall effect of LiFeAs: Evidence for electron-electron scattering

O. Heyer, T. Lorenz, V.B. Zabolotnyy, D.V. Evtushinsky, S.V. Borisenko, I. Morozov,
L. Harnagea, S. Wurmehl, C. Hess, B. Büchner

Phys. Rev. B 84, 64512 (2011)

43) Multigap superconductivity in single crystals of Ba_0.65Na_0.35Fe₂As₂: A calorimetric investigation

A.K. Pramanik, M. Abdel-Hafiez, S. Aswartham, A.U.B. Wolter, S. Wurmehl, V. Kataev,
B. Büchner

Phys. Rev. B 84, 64525 (2011)

42) Suppressed superconductivity in charge-doped Li(Fe_1-xCo_x)As single crystals

S. Aswartham, G. Behr, L. Harnagea, D. Bombor, A. Bachmann, I.V. Morozov,
V.B. Zabolotnyy, A.A. Kordyuk, T.K. Kim, D.V. Evtushinsky, S.V. Borisenko, A.U.B. Wolter, C. Hess, S. Wurmehl, B. Büchner

Phys. Rev. B 84, 54534 (2011)

41) Fishtail effect and vortex dynamics in LiFeAs single crystals

A.K. Pramanik, L. Harnagea, C. Nacke, A.U.B. Wolter, S. Wurmehl, V. Kataev, B. Büchner

Phys. Rev. B 83, 94502  (2011)

40) As vacancies, local moments, and Pauli limiting in LaFeAs_1-dO_0.9F_0.1 superconductors

V. Grinenko, K. Kikoin, S.-L. Drechsler, G. Fuchs, K. Nenkov, S. Wurmehl, F. Hammerath,
G. Lang, H.-J. Grafe, B. Holzapfel, J. Brink, B. Buechner, L. Schultz

Phys. Rev. B 84, 134516 (2011)

39) Pseudogap-like phase in Ca(Fe_1-xCo_x)₂As₂ revealed by ⁷⁵As NQR

S.-H. Baek, H.-J. Grafe, L. Harnagea, S. Singh, S. Wurmehl, B. Büchner

Phys. Rev. B 84, 94510 (2011)

38) Transport and thermal properties of single- and polycrystalline NiZr_0.5Hf_0.5Sn

S. Ouardi, G.H. Fecher, C. Felser, C.G.F. Blum, D. Bombor, C. Hess, S. Wurmehl,
B. Büchner, E. Ikenaga

Appl. Phys. Lett. 99, 152112 (2011)

37) Exploring the details of the martensite-austenite phase transition of the shape memory Heusler compound Mn₂NiGa by hard x-ray photoelectron spectroscopy, magnetic and transport measurements

C.G.F. Blum, S. Ouardi, G.H. Fecher, B. Balke, X. Kozina, G. Stryganyuk, S. Ueda,
K. Kobayashi, C. Felser, S. Wurmehl, B. Büchner

Appl. Phys. Lett. 98, 252501 (2011)

36) Generic Fe buffer layers for Fe-based superconductors: Epitaxial FeSe_1-xTe_x thin films

K. Iida, J. Haenisch, M. Schulze, S. Aswartham, S. Wurmehl, B. Büchner, L. Schultz, B. Holzapfel

Appl. Phys. Lett. 99, 202503 (2011)

2010 (#7)

35) Weak Superconducting Pairing and a Single Isotropic Energy Gap in Stoichiometric LiFeAs

D. S. Inosov, J. S. White, D.V. Evtushinsky, I.V. Morozov, A. Cameron, U. Stockert,
V. B. Zabolotnyy, T. K. Kim, A. A. Kordyuk, S.V. Borisenko,  E. M. Forgan, R. Klingeler,
J. T. Park, S. Wurmehl, A. N. Vasiliev, G. Behr, C. D. Dewhurst, V. Hinkov

Phys. Rev. Lett. 104, 187001 (2010)

34) Pinning effects in ceramic SmO_1-xF_xFeAs as revealed by microwave absorption

N.Y. Panarina, Y.I. Talanov, T.S. Shaposhnikova, N.R. Beysengulov, E. Vavilova, G. Behr, A. Kondrat, C. Hess, N. Leps, S. Wurmehl, R. Klingeler, V. Kataev, B. Büchner

Phys. Rev. B 81, 224509 (2010)

33) Critical current and vortex dynamics in single crystals of Ca(Fe_1-xCo_x)₂As₂

A.K. Pramanik, L. Harnagea, S. Singh, S. Aswartham, G. Behr, S. Wurmehl, C. Hess,
R. Klingeler, B. Büchner

Phys. Rev. B 82, 14503 (2010)

32) Crystal and magnetic structure of the oxypnictide superconductor LaFeAsO_1-xF_x: A neutron-diffraction study

N. Qureshi, Y. Drees, J. Werner, S. Wurmehl, C. Hess, R. Klingeler, B. Büchner,
M. T. Fernández-Díaz, M. Braden

Phys. Rev. B 82, 184521 (2010)

31) Single crystal growth and characterization of superconducting LiFeAs

I. Morozov, A. Boltalin, O. Volkova, A. Vasiliev, O. Kataeva, U. Stockert, M. Abdel-Hafiez,
D. Bombor, A. Bachmann, L. Harnagea, M. Fuchs, H.-J. Grafe, G. Behr, R. Klingeler,
S. Borisenko, C. Hess, S. Wurmehl, B. Büchner

Cryst. Growth and Design 10, 4429 (2010)

30) Hyperfine magnetic field on iron atoms and Co-Fe disordering in Co₂FeSi

V. Ksenofontov, M. Wójcik, S. Wurmehl, H. Schneider, B. Balke, G. Jakob, C. Felser

J. Appl. Phys. 107, 09B106 (2010)

29) Local antiferromagnetic correlations in the iron pnictide superconductors LaFeAsO_1−xF_x and Ca(Fe_1−xCo_x)₂As₂ as seen via normal-state susceptibility

R. Klingeler, N. Leps, I. Hellmann, A. Popa, U. Stockert, C. Hess, V. Kataev, H.-J. Grafe, F. Hammerath, G. Lang, S. Wurmehl, G. Behr, L. Harnagea, S. Singh, B. Büchner

Phys. Rev. B 81, 024506 (2010)

2009 (#2)

28) Highly ordered, half-metallic Co₂FeSi single crystals

C. G. F. Blum, C. A. Jenkins, J. Barth, C. Felser, S. Wurmehl, G. Friemel, C. Hess, G. Behr, B. Büchner, A. Reller, S. Riegg, J. T. Kohlhepp, H. J. H. Swagten, B. Koopmans

Appl. Phys. Lett. 95, 161903 (2009)

27) Off-stoichiometry in Co₂FeSi thin films sputtered from stoichiometric targets revealed by nuclear magnetic resonance    

S. Wurmehl, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans, C. G. F. Blum, V. Ksenofontov, H. Schneider, G. Jakob, D. Ebke, G. Reiss

J. Phys. D: Appl. Phys. 42, 084017 (2009)

2008 (#4)

26) Topical review: Nuclear magnetic resonance studies of materials for spintronic applications

S. Wurmehl, J. T. Kohlhepp

J. Phys. D: Appl. Phys. 41, 173002 (2008)

25) Rational design of new materials for spintronics: Co₂FeZ (Z = Al, Ga, Si, Ge)

B. Balke, S. Wurmehl, G. H. Fecher, C. Felser, J. Kübler

Sci. Technol. Adv. Mater. 9, 014102 (2008)

24) Hyperfine field distribution in the Heusler compound Co₂FeAl probed by ⁵⁹Co NMR

S. Wurmehl, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans

J. Phys. D: Appl. Phys. 41, 115007 (2008)

23) Effects of random distribution in Co₂Mn_1−xFe_xSi compounds probed by ⁵⁵Mn NMR

S. Wurmehl, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans, M. Wójcik , B. Balke,
C. G. F. Blum, V. Ksenofontov, G. H. Fecher, C. Felser

J. Appl. Phys. 103, 07D706 (2008)

2007 (#5)

22) Probing the random distribution of half-metallic Co₂Mn_1−xFe_xSi Heusler alloys

S. Wurmehl, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans, M. Wójcik , B. Balke,
C. G. F. Blum, V. Ksenofontov, G. H. Fecher, C. Felser

Appl. Phys. Lett. 91, 052506 (2007)

21) Bulk sensitive photoemission spectroscopy of Heusler compounds

G. H. Fecher, S. Wurmehl,  B. Balke, K. Kobayashi, Y. Takeda, Y. Saitoh, H. A. Dürr, 
F. Kronast, C. Felser

J. Electron Spectroscopy and Related Phenomena 156-158 XXXVI (2007)

20) Structural characterization of the Co₂FeZ (Z=Al, Si, Ga, and Ge) Heusler compounds by
x-ray diffraction and extended x-ray absorption fine structure spectroscopy

B. Balke, S. Wurmehl, G. H. Fecher, C. Felser, M. C. M. Alves, F. Bernardi, J. Morais

Appl. Phys. Lett. 90, 172501 (2007)

19) Structural properties of the quaternary Heusler alloy Co₂Cr_1-xFe_xAl.

S. Wurmehl, M. C. M. Alves, J. Morais, V. Ksenofontov, S. R. Teixeira, G. Machado,
G. H. Fecher, C. Felser

J. Phys. D: Appl. Phys. 40, 1524 (2007)

18) Structural, magnetic and transport properties of Co₂FeSi Heusler films

H. Schneider, Ch. Herbort, G. Jakob, M. Jourdan, H. Adrian, S. Wurmehl, C. Felser

J. Phys. D: Appl. Phys. 40, 1548 (2007)

2006 (#11)

17) Epitaxial film growth and magnetic moments of Co₂FeSi

H. Schneider, G. Jakob, M. Kallmayer, H.-J. Elmers, M. Cinchetti, S. Wurmehl, C. Felser,
M. Aeschlimann, H. Adrian

Phys. Rev. B 74, 174426 (2006)

16) Structure and properties of the CoMnSb in the context of  half-metallic ferromagnetism

V. Ksenofontov, G. Melnyk, M. Wojcik, S. Wurmehl, K. Kroth, S. Reiman, P. Blaha, C. Felser

Phys. Rev. B 74, 134426 (2006)

15) Powder Magnetoresistance of Co₂Cr_0.6Fe_0.4Al /Al₂O₃ Powder Compacts

T. Block, S. Wurmehl, J. Windeln, C. Felser

Appl. Phys. Lett. 88, 202504 (2006)

14) Structural Properties of the Quaternary Heusler Compound Co₂Cr_1-xFe_xAl

S. Wurmehl, J. Morais, M. C. M. Alves, S. R. Teixeira, G. H. Fecher, C. Felser

J. Alloys and Comp. 423, 159 (2006)

13) Co₂CrIn: A Further Magnetic Heusler Compound

S. Wurmehl, G. H. Fecher, C. Felser

Z. Naturforsch. B 61B, 749 (2006)

12) Valence electron rules for prediction of half-metallic compensated-ferrimagnetic
behaviour of Heusler compounds with complete spin polarisation.

S. Wurmehl, H. C. Kandpal, G. H. Fecher, C. Felser

J. Phys.: Condens. Matter. 18, 6171 (2006)

11) Slater-Pauling Rule and Curie-Temperature of Co₂ Based Heusler Compounds

G. H. Fecher, H. C. Kandpal, S. Wurmehl, G. Schönhense, C. Felser

J. Appl. Phys. 99, 08J106 (2006)

10) Half-metallic Ferromagnetism with High Magnetic Moment and High Curie Temperature
in Co₂FeSi

S. Wurmehl, G. H. Fecher, V. Ksenofontov, F. Casper, U. Stumm, H.-J. Lin, Y. Hwu,
C. Felser

J. Appl. Phys. 99, 08J103 (2006)

9) Electronic Structure and Spectroscopy of the Quaternary Heusler Alloy Co₂Cr_1-xFe_xAl

S. Wurmehl, G. H. Fecher, K. Kroth, F. Kronast, H. A. Dürr, Y. Takeda, Y. Saitoh,
K. Kobayashi, H.-J. Lin, G. Schönhense

J. Phys. D: Appl. Phys. 39, 803 (2006)

8) Magnetic Properties of Co₂Mn_1-xFe_xSi Heusler Alloys

M. Kallmayer, H. J. Elmers, B. Balke, S. Wurmehl, F. Emmerling, G. H. Fecher, C. Felser

J. Phys. D: Appl. Phys. 39, 786 (2006)

7) Investigation of Co₂FeSi: The Heusler Compound with Highest Curie Temperature and
Magnetic Moment

S. Wurmehl, G. H. Fecher, H. C. Kandpal, V. Ksenofontov, H.-J. Lin, C. Felser

Appl. Phys. Lett. 88, 032503 (2006)

2005 (#2)

6) Design of Magnetic Materials. Part I: The Electronic Structure of the Ordered, Doped
Heusler Compound Co₂Cr_1-xFe_xAl

G. H. Fecher, H. C. Kandpal, S. Wurmehl, C. Felser, G. Schönhense

J. Phys.: Condens. Matter. 17, 7237 (2005)

5) Geometric, Electronic, and Magnetic Structure of Co₂FeSi: Curie Temperature and
Magnetic Moment Measurements and Calculations

S. Wurmehl, G. H. Fecher, H. C. Kandpal, V. Ksenofontov, H. J. Lin, J. Morais, C. Felser

Phys. Rev. B 72, 184434 (2005)

2004 (#2)

4) Field Dependence of Orbital Magnetic Moments in the Heusler Compounds Co₂FeAl and
Co₂Cr_0.6Fe_0.4Al

H. J. Elmers, S. Wurmehl, G. H. Fecher, G. Jakob, C. Felser, G. Schönhense

Appl. Phys. A 79, 557 (2004)

3) Enhanced Orbital Magnetic Moments in the Heusler Compounds Co₂CrAl, Co₂Cr_0.6Fe_0.4Al
and Co₂FeAl

H. J. Elmers, S. Wurmehl, G. H. Fecher, G. Jakob, C. Felser, G. Schönhense

J. Magn. Magn. Mater. 272-276, 758 (2004)

2003 (#2)

2) Investigation of a Novel Material for Magnetoelectronics: Co₂Cr_0.6Fe_0.4Al

C. Felser, B. Heitkamp, F. Kronast, D. Schmitz, S. Cramm, H. A. Dürr, H. J. Elmers,
G. H. Fecher, S. Wurmehl, T. Block, D. Valdaitsev, S. A. Nepijko, A. Gloskovskii, G. Jakob, G. Schönhense, W. Eberhardt

J. Phys.: Condens. Matter. 15, 7019 (2003)

1) Element Specific Magnetic Moments from Core-absorption Magnetic Circular Dichroism of the Doped Heusler Alloy Co₂Cr_0.6Fe_0.4Al

H. J. Elmers, G. Fecher, D. Valdaitsev, S. Nepijko, A. Gloskowskij, G. Jakob,
G. Schönhense, S. Wurmehl, T. Block, C. Felser, P.-C. Hsu, W.-L. Tsai, S. Cramm

Phys. Rev. B 67, 104412 (2003)