Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Spin splitting of surface states in HgTe quantum wells. / Dobretsova, A. A.; Kvon, Z. D.; Krishtopenko, S. S. и др.
в: Low Temperature Physics, Том 45, № 2, 01.02.2019, стр. 159-164.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Spin splitting of surface states in HgTe quantum wells
AU - Dobretsova, A. A.
AU - Kvon, Z. D.
AU - Krishtopenko, S. S.
AU - Mikhailov, N. N.
AU - Dvoretsky, S. A.
PY - 2019/2/1
Y1 - 2019/2/1
N2 - We report on beating appearance in Shubnikov-de Haas oscillations in conduction band of 18-22 nm HgTe quantum wells under applied top-gate voltage. Analysis of the beatings reveals two electron concentrations at the Fermi level arising due to Rashba-like spin splitting of the first conduction subband H1. The difference ΔNs in two concentrations as a function of the gate voltage is qualitatively explained by a proposed toy electrostatic model involving the surface states localized at quantum well interfaces. Experimental values of ΔNs are also in a good quantitative agreement with self-consistent calculations of Poisson and Schrödinger equations with eight- band k . p Hamiltonian. Our results clearly demonstrate that the large spin splitting of the first conduction subband is caused by surface nature of H1 states hybridized with the heavy-hole band.
AB - We report on beating appearance in Shubnikov-de Haas oscillations in conduction band of 18-22 nm HgTe quantum wells under applied top-gate voltage. Analysis of the beatings reveals two electron concentrations at the Fermi level arising due to Rashba-like spin splitting of the first conduction subband H1. The difference ΔNs in two concentrations as a function of the gate voltage is qualitatively explained by a proposed toy electrostatic model involving the surface states localized at quantum well interfaces. Experimental values of ΔNs are also in a good quantitative agreement with self-consistent calculations of Poisson and Schrödinger equations with eight- band k . p Hamiltonian. Our results clearly demonstrate that the large spin splitting of the first conduction subband is caused by surface nature of H1 states hybridized with the heavy-hole band.
KW - SINGLE DIRAC CONE
KW - TOPOLOGICAL-INSULATOR
KW - SCATTERING
UR - http://www.scopus.com/inward/record.url?scp=85060960388&partnerID=8YFLogxK
UR - https://www.elibrary.ru/item.asp?id=38672509
U2 - 10.1063/1.5086405
DO - 10.1063/1.5086405
M3 - Article
AN - SCOPUS:85060960388
VL - 45
SP - 159
EP - 164
JO - Low Temperature Physics
JF - Low Temperature Physics
SN - 1063-777X
IS - 2
ER -
ID: 18484635