Spin-orbit splitting of valence and conduction bands in HgTe quantum wells near the Dirac point / Minkov G. M.,Germanenko A. V.,Rut O. E.,Sherstobitov A. A.,Nestoklon M. O.,Dvoretski S. A.,Mikhailov N. N. // PHYSICAL REVIEW B. - 2016. - V. 93, l. 15.

ISSN/EISSN:

2469-9950 / 2469-9969

Type:

Article

Abstract:

Energy spectra both of the conduction and valence bands of the HgTe quantum wells with a width close to the Dirac point were studied experimentally. Simultaneous analysis of the Shubnikov-de Haas oscillations and the Hall effect over a wide range of electron and hole densities yields surprising results: the top of the valence band is strongly split by spin-orbit interaction while the splitting of the conduction band is absent, within experimental accuracy. This holds true for the structures with normal and inverted band ordering. The results obtained are inconsistent with the results of kP calculations, in which the smooth electric field across the quantum well is only reckoned in. It is shown that taking into account the asymmetry of the quantum-well interfaces within a tight-binding method gives reasonable agreement with the experimental data.

Author keywords:

SEMICONDUCTOR; STATES

DOI:

10.1103/PhysRevB.93.155304

Web of Science ID:

ISI:000373760500005

Соавторы в МНС:

Другие поля

Поле	Значение
Month	APR 11
Publisher	AMER PHYSICAL SOC
Address	ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Language	English
Article-Number	155304
EISSN	2469-9969
Keywords-Plus	SEMICONDUCTOR; STATES
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Sherstobitov, Andrey/K-3838-2013 Nestoklon, Mikhail/C-7670-2014 Minkov, Grigory/K-3855-2013
ORCID-Numbers	Sherstobitov, Andrey/0000-0001-9267-4181 Nestoklon, Mikhail/0000-0002-0454-342X Minkov, Grigory/0000-0001-8090-5309
Funding-Acknowledgement	Russian Foundation for Basic Research {[}15-02-02072, 16-02-00516]; Act 211 Government of the Russian Federation {[}02.A03.21.0006]; Ministry of Education and Science of the Russian Federation {[}3.571.2014/K, 2457]
Funding-Text	We are grateful to I. V. Gornyi, S. A. Tarasenko, and O. E. Raichev for useful discussions. The work has been supported in part by the Russian Foundation for Basic Research (Grants No. 15-02-02072 and No. 16-02-00516) and by Act 211 Government of the Russian Federation, Agreement No. 02.A03.21.0006. A.V.G. and O.E.R. gratefully acknowledge financial support from the Ministry of Education and Science of the Russian Federation under Projects No. 3.571.2014/K and No. 2457.
Number-of-Cited-References	26
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	21
Journal-ISO	Phys. Rev. B
Doc-Delivery-Number	DI8OO