Zobrazeno 1 - 10
of 666
pro vyhledávání: '"Teppe, F."'
By using the self-consistent Born approximation, we investigate disorder effect induced by short-range impurities on the band-gap of a seminal two-dimensional (2D) system, whose phase diagram contains trivial, single-band-inverted and double-band-inv
Externí odkaz:
http://arxiv.org/abs/2308.13440
Autor:
Benhamou-Bui, B., Consejo, C., Krishtopenko, S. S., Szoła, M., Maussang, K., Ruffenach, S., Chauveau, E., Benlemqwanssa, S., Bray, C., Baudry, X., Ballet, P., Morozov, S. V., Gavrilenko, V. I., Mikhailov, N. N., Dvoretskii, S. A., Jouault, B., Torres, J., Teppe, F.
Publikováno v:
APL Photonics 8, 116106 (2023)
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 Terahertz (THz) frequency range. Due to their relativistic-like dynamics,
Externí odkaz:
http://arxiv.org/abs/2307.11642
Autor:
Gebert, S., Consejo, C., Krishtopenko, S. S., Ruffenach, S., Szola, M., Torres, J., Bray, C., Jouault, B., Orlita, M., Baudry, X., Ballet, P., Morozov, S. V., Gavrilenko, V. I., Mikhailov, N. N., Dvoretskii, S. A., Teppe, F.
Publikováno v:
Nature Photonics (2023)
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-equidistance of the Landau levels from Dirac fermions would suppress the harmfu
Externí odkaz:
http://arxiv.org/abs/2301.05942
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 exist in the vicinity of the electrodes/antennas through the proximity
Externí odkaz:
http://arxiv.org/abs/2210.02839
Autor:
Bray, C., Maussang, K., Consejo, C., Delgado-Notario, J. A., Krishtopenko, S. S., Yahniuk, I., Gebert, S., Ruffenach, S., Dinar, K., Moench, E., Indykiewicz, K., Jouault, B., Torres, J., Meziani, Y. M., Knap, W., Yurgens, A., Ganichev, S. D., Teppe, F.
Publikováno v:
Phys. Rev. B 106, 245141 (2022)
Graphene is a quantum spin Hall insulator with a 45 $\mu$eV wide non-trivial topological gap induced by the intrinsic spin-orbit coupling. Even though this zero-field spin splitting is weak, it makes graphene an attractive candidate for applications
Externí odkaz:
http://arxiv.org/abs/2209.14001
Autor:
Avogadri, C., Gebert, S., Krishtopenko, S. S., Castillo, I., Consejo, C., Ruffenach, S., Roblin, C., Bray, C., Krupko, Y., Juillaguet, S., Contreras, S., Wolf, A., Hartmann, F., Höfling, S., Boissier, G., Rodriguez, J. B., Nanot, S., Tournié, E., Teppe, F., Jouault, B.
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 band-gap vanishing with temperature, while the gap in InAs/GaSb QSHIs i
Externí odkaz:
http://arxiv.org/abs/2203.05977
Autor:
Yahniuk, I., Kazakov, A., Jouault, B., Krishtopenko, S. S., Kret, S., Grabecki, G., Cywiński, G., Mikhailov, N. N., Dvoretskii, S. A., Przybytek, J., Gavrilenko, V. I., Teppe, F., Dietl, T., Knap, W.
HgTe quantum wells with a thickness of ${\sim}$7 nm may have a graphene-like band structure and have been recently proposed to be potential candidates for quantum Hall effect (QHE) resistance standards under the condition of operation in the fields a
Externí odkaz:
http://arxiv.org/abs/2111.07581
We calculate the dispersion of the plasmon-LO modes taking into account the spatial dispersion of the electronic polarizability. It is shown that stimulated emission of the plasmon-LO mode is possible in the frequency range corresponding to the Rests
Externí odkaz:
http://arxiv.org/abs/2106.04848
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 the energy scale of the band gap the dependence of plasmon frequencie
Externí odkaz:
http://arxiv.org/abs/2010.16120
Autor:
Krishtopenko, S. S., Kadykov, A. M., Gebert, S., Ruffenach, S., Consejo, C., Torres, J., Avogadri, C., Jouault, B., Knap, W., Mikhailov, N. N., Dvoretskii, S. A., Teppe, F.
Publikováno v:
Phys. Rev. B 102, 041404 (2020)
We report on the far-infrared magnetospectroscopy of HgTe quantum wells with inverted band ordering at different electron concentrations. We particularly focus on optical transitions from zero-mode Landau levels, which split from the edges of electro
Externí odkaz:
http://arxiv.org/abs/1912.04818