Employment
Since 2011                Scientist (post-doc and group leader since 2015), Quantum transport group, Leibniz Institute for Solid State and Material Research (IFW-IFF), Dresden, Germany
10/2010 - 01/2011   Employee at Weser & Kollegen, European Patent and Trademark Attorney, Munich, Germany
2008 - 2010              Post-Doctoral position, Walter Schottky Institute, Technische Universität München, Germany. Group of Prof. A. Fontcuberta i Morral
2007 - 2008              Post-Doctoral position, Service de Physique de l’Etat Condensé/CEA-Saclay, France. Group of Dr. D. C. Glattli.

Education
2007            PhD (Solid State Physics)
                    Laboratoire de Photonique et Nanostructures, Marcoussis, France.
                    Under the supervision of Dr. D. Mailly. "Quantum Coherence and Interaction in Two-Dimensional Electron Gases"
2003             Master’s degree in Solid State Physics
                     Ecole Doctorale de Physique de la région Parisienne (Ecole Normale Supérieure ENS-Ulm / Ecole Polytechnique / Universités Paris VI-VII-XI), France
2003             École Supérieure d’Électricité diploma
                     Supélec (engineering school), Gif-sur-Yvette, France
1997-2000    Classe préparatoires aux grandes écoles (preparatory school for entry to higher education), Lycée Carnot, Dijon, France

Preprints

Large Nernst Effect in Te-based van der Waals Materials
M. Behnami; M. Gillig; A. G. Moghaddam; D. V. Efremov ; G. Shipunov ; B. R. Piening ; I. V. Morozov ; S. Aswartham ; J. Dufouleur ; K. Ochkan ; J. Zemen ; V. Kocsis ; C. Hess ; M. Putti ; B. Büchner ; F. Caglieris and H. Reichlova (arXiv:2411.19660, submitted – 2024)

Non-Hermitian topology in the quantum Hall effect of graphene
B. Özer, K. Ochkan, R. Chaturvedi, E. Maltsev, V. Könye, R. Giraud, A. Veyrat, E. M. Hankiewicz, K. Watanabe, T. Taniguchi, B. Büchner, J. van den Brink, I. C. Fulga, J. Dufouleur and L. Veyrat (arXiv:2410.14329, submitted – 2024)

Room temperature Planar Hall effect in nanostructures of trigonal-PtBi2
A. Veyrat,K. Koepernik, L. Veyrat, G. Shipunov, S. Aswartham, J. Qu, A. Kumar, M. Ceccardi, F. Caglieris, N. P. Rodríguez, R. Giraud, B. Büchner, J. van den Brink, C. Ortix and J. Dufouleur (arXiv:2410.12596, submitted – 2024)

Dissipationless transport signature of topological nodal lines
A. Veyrat,K. Koepernik, L. Veyrat, G. Shipunov, S. Aswartham, J. Qu, A. Kumar, M. Ceccardi, F. Caglieris, N. P. Rodríguez, R. Giraud, B. Büchner, J. van den Brink, C. Ortix and J. Dufouleur (arXiv:2410.02353, submitted – 2024)

Publications

Controlled Growth of 3D Topological Insulator BiSb(Te_1-ySe_y)₃ Nanocrystals by Chemical Vapor Transport
N. Abdelrahman; T. Charvin; S. Froeschke; R. Giraud; J. Dufouleur ; A. Popov ; S. Schiemenz; D. Wolf; B. Büchner; M. Mertig; S. Hampel (accepted at Journal of Materials Chemistry C – 2024)

Non-Hermitian topological ohmmeter
V. Könye, K. Ochkan, A. Chyzhykova, J. C. Budich, J. van den Brink, I. C. Fulga and J. Dufouleur, arXiv:2308.11367, Phys. Rev. Applied 22, L031001 (2024)

Observation of non-Hermitian topology in a multi-terminal quantum Hall device
K. Ochkan, R. Chaturvedi, V. Könye, L. Veyrat, R. Giraud, D. Mailly, A. Cavanna, U. Gennser, E. M. Hankiewicz, B. Büchner, J. van den Brink, J. Dufouleur and I. C. Fulga, arXiv:2305.18674, Nature Physics  20, 395–401 (2024)

Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO₂
T. Tschirner, P. Kessler, R. G. Betancourt, T. Kotte, D. Kriegner, B. Büchner, J. Dufouleur, M. Kamp, V. Jovic, L. Smejkal, J. Sinova, R. Claessen, T. Jungwirth, S. Moser, H. Reichlova and L. Veyrat, arXiv:2309.00568, APL Mater. 11, 101103 (2023)

Linear colossal magnetoresistance driven by magnetic textures in LaTiO₃ thin films on SrTiO₃
T. Tschirner, B. Leikert, F. Kern, D. Wolf, A. Lubk, M. Kamp, K. Miller, F. Hartmann, S. Höfling, B. Büchner, J. Dufouleur, M. Gabay, M. Sing, R. Claessen, and L. Veyrat, Physical Review B 108, 245405 (2023) ; Arxiv:2210.07682

Berezinskii–Kosterlitz–Thouless Transition in the Type-I Weyl Semimetal.PtBi₂
A. Veyrat, V. Labracherie, R. Acharya, D. L. Bashlakov, F. Caglieris, J. I. Facio, G. Shipunov, L. Graf, J. Schoop, Y. Naidyuk, R. Giraud, J. van den Brink, B. Büchner, C. Hess, S. Aswartham and J. Dufouleur, Nano Letters, 23, 1229–1235 (2023) ; Arxiv:2101.01620

Determination of Cleavage-Energy and Effcient Nanostructuring of Layered Materials by Atomic Force Microscopy
B. Rasche, J. Brunner, T. Schramm, M. P. Ghimire, U. Nitzsche, B. Büchner, R. Giraud, M. Richter, and J. Dufouleur, Nano Letters 22, 3550−3556 (2022)

Direct deposition of (Bi_xSb_1-x)₂Te₃ nanosheets on Si/SiO₂ sub-strates by chemical vapor transport
F. Hansen, R. Fucke, T. Charvin, S. Froeschke, D. Wolf, R. Giraud, J. Dufouleur, B. Büchner, P. Schmidt and S. Hampel, Cryst. Growth Des. 22, 2354−2363 (2022)

Quantum Transport in Nanostructures of 3D Topological Insulators
R. Giraud and J. Dufouleur, (doi:10.1002/pssb.202000066) Phys. Status Solidi B 258, 2000066 (2021)

Polymorphic PtBi₂: Growth, structure, and superconducting properties
G. Shipunov, I. Kovalchuk,B. R. Piening, V. Labracherie, A. Veyrat, D. Wolf, A Lubk, S Subakti, R. Giraud, J. Dufouleur, S. Shokri, F. Caglieris, C. Hess, D. V. Efremov, B. Büchner, & S. Aswartham (arXiv:2002.03976), Phys. Rev. Materials 4, 124202 (2020)

Disorder-induced coupling of Weyl nodes in WTe₂
S. Sykora, J. Schoop, L. Graf, G. Shipunov, I. V. Morozov, S. Aswartham, B. Büchner, C. Hess, R. Giraud and J. Dufouleur (arXiv:2002.01315), Phys. Rev. Research 2, 33041 (2020)

Meta-magnetism of weakly-coupled antiferromagnetic topological insulators
A. Tan, V. Labracherie, N. Kunchur, A.U.B. Wolter, J. Cornejo, J. Dufouleur, B. Büchner, A. Isaeva and R. Giraud (arXiv:1912.13113), Physical Review Letters 124, 197201 (2020)

Magnetotransport measurements on Bi₂Te₃ nanowires electrodeposited in etched ion-track membranes
J. Krieg, R. Giraud, H. Funke, J. Dufouleur, Walter Escoffier, C. Trautmann, M.E. Toimil-Molares, Journal of Physics and Chemistry 128, 360-366 (2019)

Spin-helical Dirac Fermions in 3D topological insulator quantum wires
R. Giraud and J. Dufouleur, Book chapter in “Heterojunction”, InTechOpen Book (2018)

Suppression of scattering in quantum confined 2D helical Dirac systems
J. Dufouleur, E. Xypakis, B. Büchner, R. Giraud., J. H. Bardarson, Physical Review B 97, 075401 (2018)

Weakly-coupled quasi-1D modes in disordered 3D topological insulator quantum wires
J. Dufouleur, L. Veyrat, B. Dassonneville, E. Xypakis, J. H. Bardarson, C. Nowka, S. Hampel, J. Schumann, B. Eichler, O. G. Schmidt, B. Büchner and R. Giraud., Scientific Reports 7, 45276 (2017)

Enhanced Mobility of Spin-Helical Dirac Fermions in Disordered 3D Topological Insulators
J. Dufouleur, L. Veyrat, B. Dassonneville, C. Nowka, S. Hampel, P. Leksin, B. Eichler, O. G. Schmidt, B. Büchner, and R. Giraud, Nano Letters 16, 6733 (2016)

Band Bending Inversion in Bi₂Se₃ Nanostructures
L. Veyrat, F. Iacovella, J. Dufouleur, C. Nowka, H. Funke, M. Yang, W. Escoffier, M. Goiran, B. Eichler, O. G. Schmidt, B. Büchner, S. Hampel, and R. Giraud, Nano Letters 15, 7503 (2015)

Catalyst-free Growth of Single Crystalline Bi₂Se₃ Nanostructures for Quantum Transport Studies
C. Nowka, L. Veyrat, S. Gorantla, U. Steiner, B. Eichler, O. G. Schmidt, H. Funke, J. Dufouleur, B. Büchner, R. Giraud and S. Hampel, Cryst. Growth Des. 15, 4272−4278 (2015)

Quasi-ballistic transport of Dirac fermions in a Bi₂Se₃ nanowire
J. Dufouleur, L. Veyrat, A. Teichgräber, S. Neuhaus, C. Nowka, S. Hampel, J. Cayssol, J. Schumann, B. Eichler, O. G. Schmidt, B. Büchner, and R. Giraud, Physical Review Letters 110, 186806 (2013)

A high-mobility two-dimensional electron gas at the heteroepitaxial spinel/perovskite complex oxide interface of γ-Al₂O₃/SrTiO₃
Y. Z. Chen, N. Bovet, F. Trier, D. V. Christensen, F. M. Qu, N. H. Andersen, T. Kasama, W. Zhang, R. Giraud, J. Dufouleur, T.S. Jespersen, J.R. Sun, A. Smith, J. Nygard, L. Lu, B. Büchner, B.G. Shen, S. Linderoth and & N. Pryds, Nature Communications 4, 1371 (2013)

Free standing modulation doped core-shell GaAs/AlGaAs hetero-nanowires
D. Spirkoska, A. Fontcuberta i Morral, J. Dufouleur, Q. Xie and G. Abstreiter, Physica Status Solidi - Rapid Research Letters 5, 353 (2011)

p-Doping Mechanisms in Catalyst-Free Gallium Arsenide Nanowires
J. Dufouleur, C. Colombo, T. Garma, B. Ketterer, E. Uccelli, M. Nicotra and A. Fontcuberta i Morral, Nano Letters 10, 1734 (2010)

Experimental Determination of the Statisticsof Photons Emitted by a Tunnel Junction
E. Zakka-Bajjani, J. Dufouleur, N. Coulombel, P. Roche, D. C. Glattli and F. Portier, Physical Review Letters 104, 206802 (2010)
selected as Physical Review Editors' Suggestion

High frequency shot noise of phase coherent conductors
E. Zakka‐Bajjani, J. Dufouleur, P. Roche, D. C. Glattli, A. Cavanna, Y. Jin and F. Portier, AIP Conference Proceedings 1129, 413 (2009)

A Reproducible Process for Mesoscopic Superconducting Indium Contacts to GaAs/AlGaAs Heterostructures
S. Boulay, J. Dufouleur, P. Roche, U. Gennser, A. Cavanna, and D. Mailly, Journal of applied Physics 105, 123919 (2009)

Universal Conductance Fluctuations in Epitaxial GaMnAs Ferromagnets Dephasing by Structural and Spin Disorder
L. Vila, R. Giraud, L. Thevenard, A. Lemaître, F. Pierre, J. Dufouleur, D. Mailly, B. Barbara, and G. Faini, Physical Review Letters 98, 027204 (2007)