Auteur(s): Kadykov A., Krishtopenko S., Jouault B., Desrat W., Marcinkiewicz M., Ruffenach S., Consejo C., Torres J., Morozov S. V., Gavrilenko V. I., Mikhailov N. N., Dvoretskii S. A., Knap W., Teppe F.
Conference: 2018 43RD INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ) (345 E 47TH ST, NEW YORK, NY 10017 USA, ZZ, 2018-09-09)
Actes de conférence: International Conference on Infrared Millimeter and Terahertz Waves, vol. p. (2018)
Ref HAL: hal-03037689_v1
DOI: 10.1109/IRMMW-THz.2018.8510039
Exporter : BibTex | endNote
Résumé:
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.
Commentaires: 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nagoya, JAPAN, SEP 09-14, 2018