250 citations · 1k across the 32 of their papers we have counts for
32 papers
Positive Terahertz Photoconductivity in CdHgTe Under Hydrostatic Pressure
Ivan Yahniuk, Dmitriy A. Kozlov, Mariya D. Moldavskaya +10
Positive terahertz photoconductivity is observed at room temperature in CdHgTe thin films with different Cd contents. We show that electron gas heating caused by Drude-like absorpt…
Magnetophotogalvanic Effects Driven by Terahertz Radiation in CdHgTe Crystals with Kane Fermions
M. D. Moldavskaya, L. E. Golub, V. V. Bel'kov +10
We report on the observation and comprehensive study of the terahertz radiation induced magneto-photogalvanic effect (MPGE) in bulk CdHgTe crystals hosting Kane fermions. The MPGE…
Coexistence of Topological and Normal Insulating Phases in Electro-Optically Tuned InAs/GaSb Bilayer Quantum Wells
Manuel Meyer, Tobias Fähndrich, Sebastian Schmid +7
We report on the coexistence of both normal and topological insulating phases in InAs/GaSb bilayer quantum well induced by the built-in electric field tuned optically and electrica…
Disorder-induced phase transitions in double HgTe quantum wells
S. S. Krishtopenko, A. V. Ikonnikov, B. Jouault +1
By using the self-consistent Born approximation, we investigate topological phase transitions in double HgTe quantum wells (QWs) induced by the short-range impurities. Following th…
Gate tunable terahertz cyclotron emission from two-dimensional Dirac fermions
B. Benhamou-Bui, C. Consejo, S. S. Krishtopenko +15
Two-dimensional Dirac fermions in HgTe quantum wells close to the topological phase transition can generate significant cyclotron emission that is magnetic field tunable in the Ter…
Magnetic-field-induced corner states in quantum spin Hall insulators
Sergey S. Krishtopenko, Frédéric Teppe
We address the problem of magnetic-field-induced corner states in quantum spin Hall insulators (QSHIs) beyond the particle-hole-symmetric limit. Starting from a realistic low-energ…
Terahertz cyclotron emission from two-dimensional Dirac fermions
S. Gebert, C. Consejo, S. S. Krishtopenko +13
Since the emergence of graphene, we have seen several proposals for the realization of Landau lasers tunable over the terahertz frequency range. The hope was that the non-equidista…
Current-induced enhancement of photo-response in graphene THz radiation detectors
K. Indykiewicz, C. Bray, C. Consejo +4
Thermoelectric readout in a graphene THz radiation detector requires a p-n junction across the graphene channel. Even without an intentional p-n junction, two latent junctions can…
Temperature Dependent Zero-Field Splittings in Graphene
C. Bray, K. Maussang, C. Consejo +15
Graphene is a quantum spin Hall insulator with a 45 eV wide non-trivial topological gap induced by the intrinsic spin-orbit coupling. Even though this zero-field spin splitting…
Disorder-induced topological phase transition in HgCdTe crystals
Sergey S. Krishtopenko, Mauro Antezza, Frédéric Teppe
Using the self-consistent Born approximation, we study a topological phase transition appearing in bulk HgCdTe crystals induced \emph{uncorrelated} disorder due to both randomly di…
Large inverted band-gap in strained three-layer InAs/GaInSb quantum wells
C. Avogadri, S. Gebert, S. S. Krishtopenko +17
Quantum spin Hall insulators (QSHIs) based on HgTe and three-layer InAs/GaSb quantum wells (QWs) have comparable bulk band-gaps of about 10--18~meV. The former however features a b…
Experimental evidence for long-distance electrodynamic intermolecular forces
Mathias Lechelon, Yoann Meriguet, Matteo Gori +12
Both classical and quantum electrodynamics predict the existence of dipole-dipole long-range electrodynamic intermolecular forces; however, these have never been hitherto experimen…
HgTe quantum wells for QHE metrology under soft cryomagnetic conditions: permanent magnets and liquid temperatures
I. Yahniuk, A. Kazakov, B. Jouault +11
HgTe quantum wells with a thickness of 7 nm may have a graphene-like band structure and have been recently proposed to be potential candidates for quantum Hall effect (QHE)…
Relativistic collapse of Landau levels of Kane fermions in crossed electric and magnetic fields
Sergey S. Krishtopenko, Frédéric Teppe
Using an elegant model involving only and bands, massless Kane fermions were defined as the particles associated with the peculiar band structure of gapless HgCdT…
Plasmon recombination in narrowgap HgTe quantum wells
V Ya Aleshkin, G Alymov, A A Dubinov +2
The dispersion laws of two-dimensional plasmons in narrow-gap HgTe/CdHgTe quantum wells are calculated taking into account the spatial dispersion of the electron susceptibility. At…
Many-particle effects in optical transitions from zero-mode Landau levels in HgTe quantum wells
S. S. Krishtopenko, A. M. Kadykov, S. Gebert +9
We report on the far-infrared magnetospectroscopy of HgTe quantum wells with inverted band ordering at different electron concentrations. We particularly focus on optical transitio…
Hybridization of topological surface states with a flat band
Sergey S. Krishtopenko, Mauro Antezza, Frédéric Teppe
We address the problem of hybridization between topological surface states and a non-topological flat bulk band. Our model, being a mixture of three-dimensional Bernevig-Hughes-Zha…
Unconventional Reentrant Quantum Hall Effect in a HgTe/CdHgTe Double Quantum Well
M. V. Yakunin, S. S. Krishtopenko, S. M. Podgornykh +7
We report on observation of an unconventional structure of the quantum Hall effect (QHE) in a -type HgTe/CdHgTe double quantum well (DQW) consisting of two HgTe lay…
Perspectives of HgTe Topological Insulators for Quantum Hall Metrology
Ivan Yahniuk, Sergey S. Krishtopenko, Grzegorz Grabecki +16
We report the studies of high-quality HgTe/(Cd,Hg)Te quantum wells (QWs) with a width close to the critical one , corresponding to the topological phase transition and graphen…
Terahertz detection of magnetic field-driven topological phase transition in HgTe-based transistors
A. Kadykov, F. Teppe, C. Consejo +12
We report on Terahertz detection by inverted band structure HgTe-based Field Effect Transistor up to room temperature. At low temperature, we show that nonlinearities of the transi…
The energy scale of Dirac electrons in Cd3As2
M. Hakl, S. Tchoumakov, I. Crassee +15
Cadmium arsenide (Cd3As2) has recently became conspicuous in solid-state physics due to several reports proposing that it hosts a pair of symmetry-protected 3D Dirac cones. Despite…
Realistic picture of helical edge states in HgTe quantum wells
S. S. Krishtopenko, F. Teppe
We propose a minimal effective two-dimensional Hamiltonian for HgTe/CdHgTe quantum wells (QWs) describing the side maxima of the first valence subband. By using the Hamiltonian, we…
Large gap quantum spin Hall insulator, massless Dirac fermions and bilayer graphene analogue in InAs/Ga(In)Sb heterostructures
S. S. Krishtopenko, F. Teppe
The quantum spin Hall insulator (QSHI) state has been demonstrated in two semiconductor systems - HgTe/CdTe quantum wells (QWs) and InAs/GaSb QW bilayers. Unlike the HgTe/CdTe QWs,…
Temperature-induced topological phase transition in HgTe quantum wells
A. M. Kadykov, S. S. Krishtopenko, B. Jouault +9
We report a direct observation of temperature-induced topological phase transition between trivial and topological insulator in HgTe quantum well. By using a gated Hall bar device,…