Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101814
Title: Spin-orbit splitting of the conduction band in HgTe quantum wells: Role of different mechanisms
Authors: Minkov, G. M.
Aleshkin, V. Y.
Rut, O. E.
Sherstobitov, A. A.
Germanenko, A. V.
Dvoretski, S. A.
Mikhailov, N. N.
Issue Date: 2019
Publisher: Elsevier B.V.
Citation: 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.
Abstract: 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.
Keywords: 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://hdl.handle.net/10995/101814
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85061823066
PURE ID: 9056104
4c86739d-7b13-4a4c-ba6a-facd29f4f45f
ISSN: 13869477
DOI: 10.1016/j.physe.2019.02.007
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

Files in This Item:
File Description SizeFormat 
2-s2.0-85061823066.pdf391,32 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.