%0 Conference Proceedings
%T Spectroscopy of temperature-driven single valley Dirac fermions in HgTe/CdHgTe quantum wells
%+ Laboratoire Charles Coulomb (L2C)
%+ Institut d’Electronique et des Systèmes (IES)
%+ Térahertz, hyperfréquence et optique (TéHO)
%+ Institute for Physics of Microstructures of the RAS
%+ Institute of Semiconductor Physics, Novosibirsk
%+ Novosibirsk State University (NSU)
%+ Groupe d'étude des semiconducteurs (GES)
%A Kadykov, A. M.
%A Krishtopenko, Sergey S.
%A Jouault, Benoit
%A Desrat, W.
%A Marcinkiewicz, M.
%A Ruffenach, S.
%A Consejo, C.
%A Torres, J.
%A Morozov, S. V.
%A Gavrilenko, V. I.
%A Mikhailov, N. N.
%A Dvoretskii, S. A.
%A Knap, W.
%A Teppe, F.
%Z 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nagoya, JAPAN, SEP 09-14, 2018
%< avec comité de lecture
%Z L2C:18-288
%( International Conference on Infrared Millimeter and Terahertz Waves
%B 2018 43RD INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)
%C 345 E 47TH ST, NEW YORK, NY 10017 USA, Unknown Region
%I IEEE
%3 International Conference on Infrared Millimeter and Terahertz Waves
%8 2018-09-09
%D 2018
%R 10.1109/IRMMW-THz.2018.8510039
%Z Physics [physics]/Condensed Matter [cond-mat]Conference papers
%X We report on the temperature-dependent magneto absorption and magnetotransport spectroscopy of HgTe/CdHgTe quantum wells above the critical well thickness d(c). Our results, obtained in magnetic fields up to 16 T and temperature range from 1.7 to 150 K, clearly indicate a change in the band-gap energy with temperature. A topological phase transition between quantum spin Hall and trivial insulator states, revealing appearance of single-valley Dirac fermions at T = 27 and 90 K for 6.5 and 8 nm QWs respectively, was clearly observed in our magnetospectroscopy measurements.
%G English
%L hal-03037689
%U https://hal.science/hal-03037689
%~ CNRS
%~ UNIV-MONTP2
%~ IES
%~ GES
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ ANR
%~ UM-2015-2021