Zobrazeno 1 - 10
of 346
pro vyhledávání: '"Ruffenach S"'
Autor:
Dinar, K., Delgado-Notario, J., Bray, C., Maussang, K., Perez-Martin, E., Benhamou-Bui, B., Consejo, C., Ruffenach, S., Krishtopenko, S. S., Bonnet, L., Paillet, M., Torres, J., Meziani, Y. M., Rozhansky, I., Jouault, B., Nanot, S., Teppe, F.
It has recently been shown that Terahertz sensors can effectively detect the spin resonances of Dirac fermions in graphene. The associated photovoltaic measurement technique allows for the investigation of the intrinsic spin-orbit coupling in graphen
Externí odkaz:
http://arxiv.org/abs/2411.16328
Autor:
Benlenqwanssa, S., Krishtopenko, S. S., Meyer, M., Benhamou-Bui, B., Bonnet, L., Wolf, A., Bray, C., Consejo, C., Ruffenach, S., Nanot, S., Rodriguez, J. -B., Tournié, E., Hartmann, F., Höfling, S., Teppe, F., Jouault, B.
We present a multi-probe transport analysis that effectively separates bulk and edge currents in large Hall bar devices with standard geometries. Applied to transport measurements on all possible four-probe configurations of six-probe Hall bar device
Externí odkaz:
http://arxiv.org/abs/2410.21995
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
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:
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
Autor:
Krishtopenko, S. S., Desrat, W., Spirin, K. E., Consejo, C., Ruffenach, S., Gonzalez-Posada, F., Jouault, B., Knap, W., Maremyanin, K. V., Gavrilenko, V. I., Boissier, G., Torres, J., Zaknoune, M., Tournié, E., Teppe, F.
Publikováno v:
Phys. Rev. B 99, 121405 (2019)
We report on the clear evidence of massless Dirac fermions in two-dimensional system based on III-V semiconductors. Using a gated Hall bar made on a three-layer InAs/GaSb/InAs quantum well, we restore the Landau levels fan chart by magnetotransport a
Externí odkaz:
http://arxiv.org/abs/1812.02468
Autor:
Kadykov, A., Teppe, F., Consejo, C., Viti, L., Vitiello, M., Coquillat, D., Ruffenach, S., Morozov, S., Kristopenko, S., Marcinkiewicz, M., Dyakonova, N., Knap, W., Gavrilenko, V., Michailov, N. N., Dvoretskii, S. A.
Publikováno v:
APPLIED PHYSICS LETTERS 107, 152101 (2015)
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 transistor channel allows for the observation of the quantum phase transitio
Externí odkaz:
http://arxiv.org/abs/1804.11263
Autor:
Kadykov, A. M., Krishtopenko, S. S., Jouault, B., Desrat, W., Knap, W., Ruffenach, S., Consejo, C., Torres, J., Morozov, S. V., Mikhailov, N. N., Dvoretskii, S. A., Teppe, F.
Publikováno v:
Phys. Rev. Lett. 120, 086401 (2018)
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, we measure and represent Landau levels in fan charts at different tem
Externí odkaz:
http://arxiv.org/abs/1710.06666