Dr. Hans-Joachim Grafe

Department:IFF - Magnetic and Acoustic Resonances
Address:IFW Dresden
Helmholtzstraße 20
01069 Dresden
Telephone number:+49-351-4659-239
E-mail:H.Grafe(at)ifw-dresden.de



Vita

since 2005Scientific researcher, group leader NMR, IFW Dresden
2014Two months stay abroad at University of California, Davis (Prof. N. Curro)
2005PhD in Experimental Physics, IFW Dresden and Technische Universität Dresden, Prof. B. Büchner, Thesis: “NMR Studies of Rare Earth co-doped Lanthanum Cuprates“
2003-2005PhD student at the IFW Dresden
2002-2003Stay abroad at Los Alamos National Laboratory, New Mexico (Dr. N. Curro)
2001-2003 PhD student at the 2. Physikalisches Institut, RWTH Aachen
2001Diploma in Experimental Physics, Technische Universität Braunschweig, Prof. F.J. Litterst, Diploma thesis: “NMR Messungen an der Verbindung Sr14Cu24O41“

1995-2001

 

1975

Studies of Physics at the Technische Universität Braunschweig

 

Born in Georgsmarienhütte

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Invited Talks

2016

Impurity effects in S=1/2 Heisenberg spin chains as probed by nuclear magnetic resonance
7th International Conference The New Generation in Strongly Correlated Electrons Systems 2016,
International Centre for Theoretical Physics (ICTP) in Trieste (Italy), 26.09.-30.09. 2016

NMR and NQR on iron pnictide superconductors
2nd summer school on iron pnictides of the SPP1458, Storkow (Mark), 04.04.-08.04. 2016

2015

Spin fluctuations and inhomogeneities in iron pnictide superconductors as probed by NMR and NQR
Modern Development of Magnetic Resonance, Kazan, Russia, 22.09.-26.09.2015

Nuclear Magnetic Resonance in unconventional superconductors – and the role of inhomogeneites
Seminar talk, 3. Physikalisches Institut, Universität Stuttgart, 15.07.2015

Determination of the local structure of high temperature superconductors by NMR and NQR
Seminar talk, Institut für Strukturphysik, TU Dresden, 12.5.2015


2014

Identical spin fluctuations in Cu- and Co-doped BaFe2As2
Workshop "NMR, µSR, Mössbauer spectroscopies in the study of Fe-based and other unconventional high-Tc superconductors" Dresden, 17.07.2014

Investigation of Li ion battery materials by NMR
Seminar talk, Technische Universität Darmstadt, 18.06.2014

Nuclear Magnetic Resonance on S = ½ Heisenberg Spin Chains under the Impact of Impurities
Seminar talk, University of California, Davis, USA 24.04.2014  


2012

New NMR results in the prototypical high temperature superconductors La2-xSrxCuO4 and YBa2Cu3Oy
Seminar talk of the SoleNeMaR - project, University of Zagreb, Croatia, 25.-29.06.12 2012


2011

Nuclear Magnetic Resonance Study of Pure and Ni/Co Doped LiFeAs
477. WE-Heraeus-Seminar "Unconventional Superconductivity", Bad Honnef, 11.-13.04.2011


2010

NMR studies of the New Iron Pnictide Superconductors
CIMTEC 2010, 5th Forum on New Materials, Montecatini Terme/ Italien, 13.-18.06.2010

NMR Studies of the New Iron Pnictide Superconductors
Recent Advances in Broad-band Solid-state NMR of Correlated Electronic Systems, Trogir/ Kroatien, 05.-10.09.2010


2009

NMR studies of Superconducting LaO1-xFxFeAs
Kick-off meeting of the SOLeNeMaR EU project of the Department of Physics, University of Zagreb/ Croatia, 19.-20.03.2009


2008

Nuclear magnetic resonance evidence for correlations between antiferromagnetism and pseudogap effects in Zn- and Ni-doped (Eu,Nd)Ba2Cu3O6+y single crystals
International Conference Stripes'08, Erice, Sizilien/ Italy, 26.07.-01.08.2008


2004

Local fluctuating charge order in the stripe ground state of La(1.8-x)Eu0.2SrxCuO4,
NMR-Seminar der NMR-Arbeitsgruppen im Raum Dresden, Leibniz-Institut fuer Polymerforschung Dresden, 29.01.2004

 

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Publications

2016

Unconventional charge order in a co-doped high-Tc superconductor
D. Pelc, M. Vučković, H.-J. Grafe, S.-H. Baek, M. Požek
Nature Communications 7, 12775 (2016) URL

Spatial competition of the ground states in 1111 iron pnictides
G. Lang, L. Veyrat, U. Graefe, F. Hammerath, D. Paar, G. Behr, S. Wurmehl, H.-J. Grafe
Physical Review B 94, 14514 (2016) URL

Two distinct superconducting phases in LiFeAs
P.K. Nag, R. Schlegel, D. Baumann, H.-J. Grafe, R. Beck, S. Wurmehl, B. Buechner, C. Hess
Scientific Reports 6, 27926 (2016) URL

Physical properties optimization of polycrystalline LiFeAs
S.J. Singh, U. Graefe, R. Beck, A.U.B. Wolter, H. Grafe, C. Hess, S. Wurmehl, B. Buechner
Physica C 529, 8 (2016) URL

NMR Evidence for Inhomogeneous Nematic Fluctuations in BaFe2(As1-xPx)2
A.P. Dioguardi, T. Kissikov, C.H. Lin, K.R. Shirer, M.M. Lawson, H.-J. Grafe, J.-H. Chu, I.R. Fisher, R.M. Fernandes, N.J. Curro
Phys. Rev. Lett. 116, 107202 (2016) URL

Improved hydrogen storage properties of LiBH4 via nanoconfinement in micro- and mesoporous aerogel-like carbon
A. Surrey, C. Bonatto Minella, N. Fechler, M. Antonietti, H.-J. Grafe, L. Schultz, B. Rellinghaus
International Journal of Hydrogen Energy 41 5540 (2016) URL

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
Applied Magnetic Resonance (2016) URL

 

2015

Magnetic field induced anisotropy of 139La spin-lattice relaxation rates in stripe ordered La1.875Ba0.125CuO4
S.-H. Baek, Y. Utz, M. Hücker, G. D. Gu, B. Büchner, and H.-J. Grafe
Phys. Rev. B 92, 155144 (2015) URL

NMR evidence for inhomogeneous glassy behavior driven by nematic fluctuations in iron arsenide superconductors
A. P. Dioguardi, M. M. Lawson, B. T. Bush, J. Crocker, K. R. Shirer, D. M. Nisson, T. Kissikov, S. Ran, S. L. Bud'ko, P. C. Canfield, S. Yuan, P. L. Kuhns, A. P. Reyes, H.-J. Grafe, and N. J. Curro
Phys. Rev. B 92, 165116 (2015) URL

Suppression of the impurity-induced local magnetism by the opening of a spin pseudogap in Ni-doped Sr2CuO3
Yannic Utz, Franziska Hammerath, Satoshi Nishimoto, Christian Hess, Neela Sekhar Beesetty, Romuald Saint-Martin, Alexandre Revcolevschi, Bernd Büchner, and Hans-Joachim Grafe
Phys. Rev. B 92, 060405(R) (2015) URL

High-Performance Li-O2 Batteries with Trilayered Pd/MnOx/Pd Nanomembranes
Lu, X., Deng, J., Si, W., Sun, X., Liu, X., Liu, B., Liu, L., Oswald, S., Baunack, S., Grafe, H. J., Yan, C. and Schmidt, O. G.
Advanced Science 2, 1500113 (2015) URL

NMR investigation of boron impurities in refined metallurgical grade silicon
Hans‐Joachim Grafe, Wolfgang Löser, Steffen Schmitz, Miroslava Sakaliyska, Sabine Wurmehl, Stefan Eisert, Birk Reichenbach, Jörg Acker, Anja Rietig, Jana Ducke, Tim Müller
Phys. Status Solidi A 212, 2031–2036 (2015) URL

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, and V. Kataev
Phys. Rev. B 91, 144419 (2015) URL

 

2014

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, and B. Büchner
Phys. Rev. B 90, 094519 (2014) URL

Spin gap in the single spin-1/2 chain cuprate Sr1.9Ca0.1CuO3
F. Hammerath, E. M. Brüning, S. Sanna, Y. Utz, N. S. Beesetty, R. Saint-Martin, A. Revcolevschi, C. Hess, B. Büchner, and H.-J. Grafe
Phys. Rev. B 89, 184410 (2014) URL

Unusual spin fluctuations and magnetic frustration in olivine and non-olivine LiCoPO4 detected by 31P and 7Li nuclear magnetic resonance
S.-H. Baek, R. Klingeler, C. Neef, C. Koo, B. Büchner, and H.-J. Grafe
Phys. Rev. B 89, 134424 (2014) URL

Lithium dynamics in carbon-rich polymer-derived SiCN ceramics probed by nuclear magnetic resonance
S.-H. Baek, L.M. Reinold, M. Graczyk-Zajac, R. Riedel, F. Hammerath, B. Büchner, H.-J. Grafe
Journal of Power Sources 253, 342 (2014) URL

Structure and properties of alpha--NaFeO2-type ternary sodium iridates
K. Baroudi, C. Yim, H. Wu, Q. Huang, J.H. Roudebush, E. Vavilova, H.-J. Grafe, V. Kataev, B. Buechner, H. Ji, C. Kuo, C., Z. Hu, T.-W. Pi, C. Pao, J. Lee, D. Mikhailova, L.H. Tjeng, R.J. Cava
Journal of Solid State Chemistry 210, 195 (2014) URL

Growth, characterization, and magnetic properties of a Li(Mn,Ni)PO4 single crystal
K. Wang, A. Maljuk, C.G.F. Blum, T. Kolb, C. Jaehne, C. Neef, H.-J. Grafe, L. Giebeler, H. Wadepohl, H.-P. Meyer, S. Wurmehl, R. Klingeler
Journal of Crystal Growth 386, 16 (2014) URL


2013

Progressive slowing down of spin fluctuations in underdoped LaFeAsO1−xFxF
Hammerath, U. Gräfe, T. Kühne, H. Kühne, P. L. Kuhns, A. P. Reyes, G. Lang, S. Wurmehl, B. Büchner, P. Carretta, and H.-J. Grafe
Phys. Rev. B 88, 104503 (2013)

Coupling of Li motion and structural distortions in olivine LiMnPO4 from 7Li and 31P NMR
C. Rudisch, H.-J. Grafe, J. Geck, S. Partzsch, M. v. Zimmermann, N. Wizent, R. Klingeler, and B. Büchner
Phys. Rev. B 88, 054303 (2013)

Anomalous superconducting state in LiFeAs implied by the 75As Knight shift measurement
S.-H. Baek, L. Harnagea, S. Wurmehl, B. Büchner, and H.-J. Grafe
Journal of Physics: Condensed Matter 25, 162204 (2013)

Phase separation at the magnetic–superconducting transition in La0.7Y0.3FeAsO1−xFx
G. Prando, S. Sanna, G. Lamura, T. Shiroka, M. Tropeano, A. Palenzona, H.-J. Grafe, B. Büchner, P. Carretta, R. De Renzi
Physica Status Solidi (b) 250, 599, (2013)

Common effect of chemical and external pressures on the magnetic properties of RCoPO (R = La, Pr)
G. Prando, P. Bonfà, G. Profeta, R. Khasanov, F. Bernardini, M. Mazzani, E. M. Brüning, A. Pal, V. P. S. Awana, H.-J. Grafe, B. Büchner, R. De Renzi, P. Carretta, and S. Sanna
Phys. Rev. B 87, 064401 (2013)


2012

Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single crystals revealed by 63Cu NMR
S.-H. Baek, T. Loew, V. Hinkov, C.T. Lin, B. Keimer, B. Buechner, H.-J. Grafe
Physical Review B 86 220504(R) (2012)

Persistence of singlet fluctuations in the coupled spin tetrahedra system Cu2Te2O5Br2 revealed by high-field magnetization, 79Br NQR, and 125Te NMR
S.-H. Baek, K.-Y. Choi, H. Berger, B. Büchner, H.-J. Grafe
Physical Review B 86 180405(R) (2012)

Nuclear Magnetic and Quadrupole Resonance Studies of the Stripes Materials
H.-J. Grafe
Physica C 481, 93 (2012)

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, and B. Büchner
Euro. Phys. J. B 85, 159 (2012) 

139La NMR Investigation in Underdoped La1.93Sr0.07CuO4
S.-H. Baek, A. Erb, B. Büchner, and H.-J. Grafe
Phys. Rev. B 85, 184508 (2012)

AC Susceptibility Investigation of Vortex Dynamics in Nearly Optimally Doped RFeAsO1-xFx Superconductors (R = La, Ce, Sm)
G. Prando, P. Carretta, R. De Renzi, S. Sanna, H.-J. Grafe, S. Wurmehl, and B. Büchner
Phys. Rev. B 85, 144522 (2012)   

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, and M. Braden
Phys. Rev. Lett. 108, 117001 (2012)  


2011

NMR studies of Pseudogap and Electronic Inhomogeneity in Bi2Sr2CaCu2O8+y
J. Crocker, A. P. Dioguardi, N. apRoberts-Warren, A. C. Shockley, H.-J. Grafe, Z. Xu, J. Wen, G. Gu, and N. J. Curro
Phys. Rev. B 84, 224502 (2011)

As Vacancies, Local Moments, and Pauli Limiting in LaFeAs1-yO0.9F0.1 Superconductors
Vadim Grinenko, Konstantin Kikoin, Stefan-Ludwig Drechsler, Günter Fuchs, Konstantin Nenkov, Sabine Wurmehl, Franziska Hammerath, Guillaume Lang, Hans-Joachim Grafe, Bernhard Holzapfel, Jeroen van den Brink, Bernd Büchner, and Ludwig Schultz
Phys. Rev. B. 84, 134516 (2011)

Pseudogap-like Phase in Ca(Fe1-xCox)2As2 Revealed by 75AS NQR
S. -H. Baek, H. -J. Grafe, L. Harnagea, S. Singh, S. Wurmehl, and B. Büchner
Phys. Rev. B. 84, 094510 (2011)

Spin Gap in the Zigzag Spin-1/2 Chain Cuprate Sr0.9Ca0.1CuO2
F. Hammerath, S. Nishimoto, H. -J. Grafe, A. U. B. Wolter, V. Kataev, P. Ribeiro, C. Hess, S. -L. Drechsler and B. Büchner
Phys. Rev. Lett. 107, 017203 (2011)


2010

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, and B. Büchner
Crystal Growth & Design 10, 4428 (2010)

Evidence for Pauli-limiting behaviour at high fields and enhanced upper critical fields near Tc in several disordered FeAs based superconductors
G. Fuchs, S.-L. Drechsler, N. Kozlova, M. Bartkowiak, G. Behr, K. Nenkov, H.-H. Klauss, J. Freudenberger, M. Knupfer, F. Hammerath, G. Lang, H.-J. Grafe, B. Buechner, L. Schultz
Physica C 470, 288 (2010)

Charge order and low frequency spin dynamics in lanthanum cuprates revealed by nuclear magnetic resonance
H.-J. Grafe, N.J. Curro, B.L. Young, A. Vyalikh, J. Vavilova, G.D. Gu, M. Hücker, B. Büchner
The European Physical Journal Special Topics 188, 89 (2010)

Probing of the charge distribution in iron pnictides
G. Lang, H.-J. Grafe, F. Hammerath, K. Manthey, D. Paar, G. Behr, J. Werner, J. Hamann-Borrero, B. Buechner
Physica C 470, 454 (2010)

NMR study of the electronic properties of superconducting LaO0.9F0.1FeAs
D. Paar, H.-J. Grafe, G. Lang, F. Hammerath, K. Manthey, G. Behr, J. Werner, B. Buechner
Physica C 470, 468 (2010)

Unusual disorder effects in superconducting LaFeAs1-yO0.9F0.1 as revealed by 75As NMR spectroscopy
F. Hammerath, S.-L. Drechsler, H.-J. Grafe, G. Lang, G. Fuchs, G. Behr, I. Eremin, M. M. Korshunov, and B. Büchner
Phys. Rev. B. 81, 140504 (2010)

Nanoscale Electronic Order in Iron Pnictides
G. Lang, H.-J. Grafe, D. Paar, F. Hammerath, K. Manthey, G. Behr, J. Werner, and B. Büchner
Phys. Rev. Lett. 104, 097001 (2010) 

Local Antiferromagnetic Correlations in the Iron Pnictide Superconductors LaFeAsO1-xFx and Ca(Fe1-xCox)2As2 as Seen via Normal-State Susceptibility
R. Klingerer, 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, and B. Büchner
Phys. Rev. B. 81, 024506 (2010)


2009

Electronic Properties of LaO1-xFxFeAs in the Normal State Probed by NMR/NQR
H.-J. Grafe, G. Lang, F. Hammerath,  D. Paar, K. Manthey, K. Koch, H. Rosner, N. J. Curro, G. Behr, J. Werner, N. Leps, R. Klingeler, H.-H. Klauss, F. J. Litterst and B. Büchner
New J. Phys. 11,  035002 (2009)


2008

75As NMR Studies of Superconducting LaFeAs0.9F0.1
H.-J. Grafe, D. Paar, G. Lang, N. J. Curro, G. Behr, J. Werner, J. Hamann-Borrero, C. Hess, N. Leps, R. Klingeler, and B. Büchner
Phys. Rev. Lett. 101, 047003 (2008)

A Carbon-Wrapped Nanoscaled Thermometer for Temperature Control in Biological Environments
A. Vyalikh, A. Wolter, S. Hampel, D. Haase, M. Ritschel, A. Leonhardt, H.-J. Grafe, A. Taylor, K. Kraemer, B. Buechner, R. Klingerer
Nanomedicine 3, 321 (2008)

Contrasting spin dynamics in Zn- and Ni-doped NdBa2Cu3O6+y  Single Crystals from Cu Nuclear Quadrupole Resonance: Evidence for Correlations Between Antiferromagnetism and Pseudogap Effects
H.-J. Grafe, F. Hammerath, A. Vyalikh, G. Urbanik, V. Kataev, Th. Wolf, G. Khaliullin, and B. Büchner
Phys. Rev. B. 77, 014522 (2008)


2007

Cu Nuclear Quadrupole Resonance Study of NdBa2(Cu,Zn,Ni)3O7-x
Hans-Joachim Grafe, Franziska Hammerath, Thomas Wolf, Bernd Büchner
Physica C 460, 896 (2007)

A Nanoscaled Contactless Thermometer for Biological Systems
A. Vyalikh, R. Klingerer, S. Hampel, D. Haase, M. Ritschel, A. Leonhardt, E. Borowiak-Palen, M. Rümmeli, A. Bachmatiuk, R. J. Kalenczuk, H.-J. Grafe, and B. Büchner
Phys. Stat. Sol. B 244, 4092 (2007)


2006

Nuclear-Magnetic-Resonance Evidence for Charge Inhomogeneity in Stripe Ordered La1.8-xEu0.2SrxCuO4
H.-J. Grafe, N. J. Curro, M. Hücker, and B. Büchner
Phys. Rev. Lett. 96, 017002, (2006)

2004

The Interplay of Charge Order and Magnetism in Sr14Cu24O41 and Sr13LaCu24O41 A. Bosse, D. Mienert, H.-J. Grafe, U. Janke, F.J. Litterst, U. Ammerahl, B. Büchner, and H.-H. Klauss
Journal of Magnetism and Magnetic Materials 272-276, 918 (2004)

 

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Resonance Man

 

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Slides Vorlesung Superconductivity II 2013/14