Weak antilocalization of holes in HgTe quantum wells with a normal energy spectrum / Minkov G. M.,Germanenko A. V.,Rut O. E.,Sherstobitov A. A.,Dvoretski S. A.,Mikhailov N. N. // PHYSICAL REVIEW B. - 2015. - V. 91, l. 20.

ISSN/EISSN:

1098-0121 / 1550-235X

Type:

Article

Abstract:

The results of experimental study of quantum interference effects in small magnetic fields in narrow HgTe quantum wells of hole-type conductivity with a normal energy spectrum are presented. Interpretation of the data is performed with taking into account the strong spin-orbit splitting of the energy spectrum of the twodimensional hole subband. It is shown that the phase relaxation time found from the analysis of the shape of magnetoconductivity curves in the case when the Fermi level lies in the monotonic part of the energy spectrum of the valence band behaves itself analogously to that observed in narrow HgTe quantum wells of electron-type conductivity. It increases in magnitude with the increasing conductivity and decreasing temperature following the 1/T law. Such a behavior corresponds to the inelasticity of electron-electron interaction as the main mechanism of the phase relaxation and agrees well with the theoretical predictions. For the higher conductivity, despite the fact that the dephasing time remains inversely proportional to the temperature, it strongly decreases with the increasing conductivity. It is presumed that the reason for such a peculiarity could be nonmonotonic character of the hole energy spectrum. An additional channel of inelastic interaction occurs when the Fermi level approaches the secondary maxima in the depth of the valence band.

Author keywords:

LOCALIZATION; CONDUCTIVITY; TRANSITION; CARRIERS; BAND

DOI:

10.1103/PhysRevB.91.205302

Web of Science ID:

ISI:000353966400002

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAY 6
Publisher	AMER PHYSICAL SOC
Address	ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Language	English
Article-Number	205302
EISSN	1550-235X
Keywords-Plus	LOCALIZATION; CONDUCTIVITY; TRANSITION; CARRIERS; BAND
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Sherstobitov, Andrey/K-3838-2013 Minkov, Grigory/K-3855-2013
ORCID-Numbers	Sherstobitov, Andrey/0000-0001-9267-4181 Minkov, Grigory/0000-0001-8090-5309
Funding-Acknowledgement	Russian Foundation for Basic Research {[}13-02-00322, 15-02-02072]; Russian Academy of Sciences {[}12-P-2-1051]; Ministry of Education and Science of the Russian Federation {[}3.571.2014/K, 2457]
Funding-Text	We are grateful to I. V. Gornyi, V. Yu. Kachorovskii, and P. M. Ostrovsky for useful discussions. The work has been supported in part by the Russian Foundation for Basic Research (Grants No. 13-02-00322 and No. 15-02-02072) and the Russian Academy of Sciences (Project No. 12-P-2-1051). 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	31
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	13
Journal-ISO	Phys. Rev. B
Doc-Delivery-Number	CH3YF