Zobrazeno 1 - 10
of 568
pro vyhledávání: '"Gusev, G. A."'
Publikováno v:
Phys. Rev. B 110, 195402, 2024
We investigated magnetotransport in mesoscopic samples containing electrons from three different subbands in GaAs triple wells. At high temperatures, we observed positive magnetoresistance, which we attribute to the imbalance between different types
Externí odkaz:
http://arxiv.org/abs/2411.02595
Autor:
Levin, A. D., Gusev, G. M., Hernandez, F. G. G., Olshanetsky, E. B., Kovalev, V. M., Entin, M. V., Mikhailov, N. N.
Publikováno v:
Physical Review RESEARCH 6, 023121 (2024)
The resistivity of two-dimensional (2D) metals generally exhibits insensitivity to electron-electron scattering. However, it's worth noting that Galilean invariance may not hold true in systems characterized by a spectrum containing multiple electron
Externí odkaz:
http://arxiv.org/abs/2405.02233
Autor:
Patricio, M. A. T., Jacobsen, G. M., Teodoro, M. D., Gusev, G. M., Bakarov, A. K., Pusep, Yu. A.
Publikováno v:
Phys. Rev. B 109, L121401, 2024
The dynamics of the diffusion flow of holes photoinjected into a mesoscopic GaAs channel of variable width, where they, together with background electrons, form a hydrodynamic electron-hole fluid, is studied using time-resolved microphotoluminescence
Externí odkaz:
http://arxiv.org/abs/2403.04019
Autor:
Gusev, G. M., Levin, A. D., Olshanetsky, E. B., Kvon, Z. D., Kovalev, V. M., Entin, M. V., Mikhailov, N. N.
Publikováno v:
Phys.Rev.B, v. 109, 035302 (2024)
In this study, we investigate the conductivity of a two-dimensional (2D) system in HgTe quantum well comprising two types of carriers with linear and quadratic spectra, respectively. The interactions between the two-dimensional Dirac holes and the he
Externí odkaz:
http://arxiv.org/abs/2401.01277
Publikováno v:
Physical Review B 108, 115310 (2023)
In this study, we present our experimental investigation on the magnetotransport properties of a two-dimensional electron system in GaAs quantum wells utilizing a variety of device geometries, including obstacles with thin barriers and periodic width
Externí odkaz:
http://arxiv.org/abs/2309.12964
Publikováno v:
Nanomaterials, 12(12), 2047 (2022)
We study transport properties of HgTe quantum wells with critical well thickness, where the band gap is closed, and the low energy spectrum is described by a single Dirac cone. In this work, we examined both macroscopic and micron-sized (mesocopic) s
Externí odkaz:
http://arxiv.org/abs/2206.07107
Autor:
Pusep, Yu. A., Teodoro, M. D., Laurindo Jr., V., de Oliveira, E. R. Cardozo, Gusev, G. M., Bakarov, A. K.
Publikováno v:
Phys. Rev. Lett., 2022, v. 128, 136801
The diffusion of photo-generated holes is studied in a high-mobility mesoscopic GaAs\ channel where electrons exhibit hydrodynamic properties. It is shown that the injection of holes into such an electron system leads to the formation of a hydrodynam
Externí odkaz:
http://arxiv.org/abs/2204.00041
Publikováno v:
Nanomaterials 11, 3364, 2021
The thermoelectric response of 80-nm-thick strained HgTe films of a three-dimensional topological insulator (3D TI) has been studied experimentally. An ambipolar thermopower is observed where the Fermi energy moves from conducting to the valence bulk
Externí odkaz:
http://arxiv.org/abs/2112.05966
Autor:
Ferreira, G. J., Candido, D. R., Hernandez, F. G. G., Gusev, G. M., Olshanetsky, E. B., Mikhailov, N. N., Dvoretsky, S. A.
Publikováno v:
Scientific reports 12 (1), 2617 (2022)
Quantum wells formed by layers of HgTe between Hg$_{1-x}$Cd$_x$Te barriers lead to two-dimensional (2D) topological insulators, as predicted by the BHZ model. Here, we theoretically and experimentally investigate the characteristics of triple HgTe qu
Externí odkaz:
http://arxiv.org/abs/2112.01307
Publikováno v:
2D Mater. 9, 015021, 2022
Topological insulators represent a new quantum state of matter which is characterized by edge or surface states and an insulating band gap in the bulk. In a two dimensional (2D) system based on the HgTe quantum well (QW) of critical width random devi
Externí odkaz:
http://arxiv.org/abs/2111.15530