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http://elar.urfu.ru/handle/10995/101814
Название: | Spin-orbit splitting of the conduction band in HgTe quantum wells: Role of different mechanisms |
Авторы: | Minkov, G. M. Aleshkin, V. Y. Rut, O. E. Sherstobitov, A. A. Germanenko, A. V. Dvoretski, S. A. Mikhailov, N. N. |
Дата публикации: | 2019 |
Издатель: | Elsevier B.V. |
Библиографическое описание: | Spin-orbit splitting of the conduction band in HgTe quantum wells: Role of different mechanisms / G. M. Minkov, V. Y. Aleshkin, O. E. Rut, et al. — DOI 10.1016/j.physe.2019.02.007 // Physica E: Low-Dimensional Systems and Nanostructures. — 2019. — Vol. 110. — P. 95-99. |
Аннотация: | Spin-orbit splitting of conduction band in HgTe quantum wells was studied experimentally. In order to recognize the role of different mechanisms, we carried out detailed measurements of the Shubnikov-de Haas oscillations in gated structures with a quantum well widths from 8 to 18 nm over a wide range of electron density. With increasing electron density controlled by the gate voltage, splitting of the maximum of the oscillation Fourier spectrum f 0 into two components f 1 and f 2 and the appearance of the low-frequency component f 3 was observed. Our analysis shows that the components f 1 and f 2 are determined by the electron densities n 1 and n 2 in spin-orbit split subbands while the f 3 component results from magneto-intersubband oscillations so that it is determined by the difference between these densities Δn. This allows us to obtain all three values n 1 , n 2 and Δn independently. Comparison of the data obtained with results of self-consistent calculations carried out within the framework of four-band kP model shows that the main contribution to spin-orbit splitting comes from the Bychkov-Rashba effect. Contribution of the interface inversion asymmetry to the splitting of the conduction band turns out to be four-to-five times less than that for the valence band in the same structures. © 2019 Elsevier B.V. |
Ключевые слова: | ELECTRON TRANSPORT ENERGY SPECTRUM QUANTUM WELLS CARRIER CONCENTRATION CONDUCTION BANDS ELECTRON DENSITY MEASUREMENT ELECTRON TRANSPORT PROPERTIES MERCURY COMPOUNDS QUANTUM CHEMISTRY TELLURIUM COMPOUNDS DIFFERENT MECHANISMS ELECTRON TRANSPORT ENERGY SPECTRA INVERSION ASYMMETRY LOW-FREQUENCY COMPONENTS SELF-CONSISTENT CALCULATION SHUBNIKOV DE-HAAS OSCILLATION SPIN-ORBIT SPLITTINGS SEMICONDUCTOR QUANTUM WELLS |
URI: | http://elar.urfu.ru/handle/10995/101814 |
Условия доступа: | info:eu-repo/semantics/openAccess |
Идентификатор SCOPUS: | 85061823066 |
Идентификатор PURE: | 9056104 4c86739d-7b13-4a4c-ba6a-facd29f4f45f |
ISSN: | 13869477 |
DOI: | 10.1016/j.physe.2019.02.007 |
Располагается в коллекциях: | Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC |
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Файл | Описание | Размер | Формат | |
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2-s2.0-85061823066.pdf | 391,32 kB | Adobe PDF | Просмотреть/Открыть |
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