Transformation of energy spectrum and wave functions on the way from a 2D-to-3D topological insulator in HgTe quantum wells
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Transformation of energy spectrum and wave functions on the way from a 2D-to-3D topological insulator in HgTe quantum wells
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| Автор |
Minkov, G. M.
Aleshkin, V. Ya. Rut, O. E. Sherstobitov, A. A. Dvoretski, S. A. Mikhailov, N. N. Germanenko, A. V. |
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| Тематика |
CAPACITANCE
CAPACITANCE MEASUREMENT CARRIER CONCENTRATION ELECTRONS MERCURY COMPOUNDS QUANTUM CHEMISTRY SEMICONDUCTOR QUANTUM WELLS SPECTROSCOPY TELLURIUM COMPOUNDS TWO DIMENSIONAL ELECTRON GAS 2D-TO-3D ENERGY ENERGY SPECTRUM ENERGY WAVES QUANTUM CAPACITANCE QUANTUM-WELLS SPATIAL QUANTIZATION SUBBANDS TOPOLOGICAL INSULATORS TWO-DIMENSIONAL (2D) ELECTRON GAS WAVE FUNCTIONS |
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| Описание |
A magnetotransport and quantum capacitance of the two-dimensional (2D) electron gas in HgTe/CdxHg1-xTe quantum wells of a width (20.2-46.0) nm are experimentally investigated. It is shown that the first energy subband of spatial quantization is split due to the spin-orbit interaction and the split branches are single spin, therewith the splitting strength increases with the increase of the quantum well width. The electron effective masses in the branches are close to each other within the actual density range. Magnetointersubband oscillations (MISO) observed in the structures under study exhibit the growing amplitude with the increasing electron density that contradicts to the expected decrease of wave-function overlap for the rectangular quantum well. To interpret the data obtained, we have used a self-consistent approach to calculate the electron energy spectrum and the wave function within framework of the kP model. It has been, in particular, shown that the MISO amplitude increase results from the increasing overlap of the wave functions due to their shift from the gate electrode with the gate voltage increase known as a phenomenon of the negative electron polarizability. The results obtained from the transport experiments are supported by quantum capacitance measurements. © 2022 American Physical Society.
Ministry of Education and Science of the Russian Federation, Minobrnauka, (075-15-2020-797, 13.1902.21.0024) The research was supported by a grant of Ministry of Science and Higher Education of the Russian Federation, Grant No. 075-15-2020-797 (13.1902.21.0024). |
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| Дата |
2024-04-08T11:07:01Z
2024-04-08T11:07:01Z 2022 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) info:eu-repo/semantics/submittedVersion |
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| Идентификатор |
Minkov, GM, Aleshkin, VY, Rut, OE, Sherstobitov, AA, Dvoretski, SA, Mikhailov, NN & Germanenko, AV 2022, 'Transformation of energy spectrum and wave functions on the way from a 2D-to-3D topological insulator in HgTe quantum wells', Physical Review B, Том. 106, № 8, 085301. https://doi.org/10.1103/PhysRevB.106.085301
Minkov, G. M., Aleshkin, V. Y., Rut, O. E., Sherstobitov, A. A., Dvoretski, S. A., Mikhailov, N. N., & Germanenko, A. V. (2022). Transformation of energy spectrum and wave functions on the way from a 2D-to-3D topological insulator in HgTe quantum wells. Physical Review B, 106(8), [085301]. https://doi.org/10.1103/PhysRevB.106.085301 2469-9950 Final All Open Access; Green Open Access https://arxiv.org/pdf/2112.06838 https://arxiv.org/pdf/2112.06838 http://elar.urfu.ru/handle/10995/131388 10.1103/PhysRevB.106.085301 85136202057 000879536700001 |
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| Язык |
en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
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| Формат |
application/pdf
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| Издатель |
American Physical Society
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| Источник |
Physical Review B
Physical Review B |
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