344 citations · 967 across the 25 of their papers we have counts for
19 papers · 1 filter
Anomalous and Topological Hall Effects in Antiferromagnetic EuSn2As2 Nanostructures
Evgeny I. Maltsev, Nicolas Pérez, Romain Giraud +8
We investigate magnetotransport in exfoliated nanostructures of the candidate magnetic 3D topological insulator . Similar to macroscopic single crystals, t…
Non-Hermitian topological devices with Chern insulators
Kyrylo Ochkan, Michael Wissmann, Louis Veyrat +9
Multi-terminal topological devices are a new generation of electronic devices with quantized properties robust against imperfections. In magnetic topological insulators, dissipatio…
Giant universal conductance fluctuations in the antiferromagnetic topological insulator MnBi2Te4
Michael Wissmann, Joseph Dufouleur, Louis Veyrat +4
Intrinsic magnetic topological insulators can host quantum states with quantized magneto-electric responses, such as the axion and Chern insulators states evidenced in ultra-thin M…
Transport evidence of surface states in magnetic topological insulator MnBi2Te4
Michael Wissmann, Romain Giraud, Börge Mehlhorn +8
Magnetic topological insulators can host chiral 1D edge channels at zero magnetic field, when a magnetic gap opens at the Dirac point in the band structure of 2D topological surfac…
Non-Hermitian topology in the quantum Hall effect of graphene
Burak Özer, Kyrylo Ochkan, Raghav Chaturvedi +12
Quantum Hall phases have recently emerged as a platform to investigate non-Hermitian topology in condensed-matter systems. This platform is particularly interesting due to its tuna…
Dissipationless transport signature of topological nodal lines
Arthur Veyrat, Klaus Koepernik, Louis Veyrat +12
Topological materials, such as topological insulators or semimetals, usually not only reveal the nontrivial properties of their electronic wavefunctions through the appearance of s…
Room temperature Planar Hall effect in nanostructures of trigonal-PtBi2
Arthur Veyrat, Klaus Koepernik, Louis Veyrat +13
Trigonal-PtBi2 has recently garnered significant interest as it exhibits unique superconducting topological surface states due to electron pairing on Fermi arcs connecting bulk Wey…
Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2
Teresa Tschirner, Philipp Keßler, Ruben Dario Gonzalez Betancourt +13
Observations of the anomalous Hall effect in RuO and MnTe have demonstrated unconventional time-reversal symmetry breaking in the electronic structure of a recently identified…
Non-Hermitian topological ohmmeter
Viktor Könye, Kyrylo Ochkan, Anastasiia Chyzhykova +4
Measuring large electrical resistances forms an essential part of common applications such as insulation testing, but suffers from a fundamental problem: the larger the resistance,…
Observation of non-Hermitian topology in a multi-terminal quantum Hall device
Kyrylo Ochkan, Raghav Chaturvedi, Viktor Könye +10
Quantum devices characterized by non-Hermitian topology are predicted to show highly robust and potentially useful properties, but realizing them has remained a daunting experiment…
Linear colossal magnetoresistance driven by magnetic textures in LaTiO3 thin films on SrTiO3
Teresa Tschirner, Berengar Leikert, Felix Kern +12
Linear magnetoresistance (LMR) is of particular interest for memory, electronics, and sensing applications, especially when it does not saturate over a wide range of magnetic field…
Disorder-induced coupling of Weyl nodes in WTe
Steffen Sykora, Johannes Schoop, Lukas Graf +7
The finite coupling between Weyl nodes due to residual disorder is investigated by magnetotransport studies in WTe. The anisotropic scattering of quasiparticles is evidenced fr…
Meta-magnetism of weakly-coupled antiferromagnetic topological insulators
Aoyu Tan, Valentin Labracherie, Narayan Kunchur +6
The magnetic properties of the van der Waals magnetic topological insulators MnBiTe and MnBiTe are investigated by magneto-transport measurements. We evidence that…
Suppression of scattering in quantum confined 2D-helical Dirac systems
Joseph Dufouleur, Emmanouil Xypakis, Bernd Büchner +2
Transport properties of disordered quantum confined helical Dirac systems are investigated in the large energy limit. As long as the 2D transport length is larger than the perimete…
Enhanced transport length of spin-helical Dirac fermions in disordered 3D topological insulators
J. Dufouleur, L. Veyrat, B. Dassonneville +7
The transport length and the mean free path are experimentally determined for bulk and surface states in a BiSe nanoribbon by quantum transpo…
Band bending inversion in BiSe nanostructures
Louis Veyrat, Fabrice Iacovella, Joseph Dufouleur +8
Shubnikov-de-Haas oscillations were studied under high magnetic field in BiSe nanostructures grown by Chemical Vapor Transport, for different bulk carrier densities ranging…
Quasi-ballistic transport of Dirac fermions in a Bi2Se3 nanowire
J. Dufouleur, L. Veyrat, A. Teichgraeber +9
Quantum coherent transport of Dirac fermions in a mesoscopic nanowire of the 3D topological insulator Bi2Se3 is studied in the weak-disorder limit. At very low temperatures, many h…
Experimental determination of the statistics of photons emitted by a tunnel junction
E. Zakka-Bajjani, J. Dufouleur, N. Coulombel +3
We report on a microwave Hanbury-Brown Twiss experiment probing the statistics of GHz photons emitted by a tunnel junction in the shot noise regime at low temperature. By measuring…
Universal conductance fluctuations in epitaxial GaMnAs ferromagnets: structural and spin disorder
L. Vila, R. Giraud, L. Thevenard +6
Mesoscopic transport measurements reveal a large effective phase coherence length in epitaxial GaMnAs ferromagnets, contrary to usual 3d-metal ferromagnets. Universal conductance f…