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- Temperature-dependent magnetospectroscopy of HgTe quantum wells doi link

Auteur(s): Ikonnikov A. V., Krishtopenko S., Drachenko Oleksiy, Goiran Michel, Zholudev M., Platonov V. V., Kudasov Yu. B., Korshunov A. S., Maslov D. A., Makarov I. V., Surdin O. M., Philippov A. V., Marcinkiewicz M., Ruffenach S., Teppe F., Knap W., Mikhailov N. N., Dvoretsky S. A., Gavrilenko V. I.

(Article) Publié: Physical Review B, vol. 94 p.155421 (2016)
Texte intégral en Openaccess : arxiv


Ref HAL: hal-01397638_v1
DOI: 10.1103/PhysRevB.94.155421
WoS: WOS:000385624400009
Exporter : BibTex | endNote
16 Citations
Résumé:

We report on magnetospectroscopy of HgTe quantum wells in magnetic fields up to 45 T in a temperature range from 4.2 up to 185 K. We observe intra- and inter-band transitions from zero-mode Landau levels, which split from the bottom conduction and upper valence sub-bands and merge under the applied magnetic field. To describe experimental results, realistic temperature-dependent calculations of Landau levels have been performed. We show that although our samples are topological insulators at low temperatures only, the signature of such a phase persists in optical transitions at high temperatures and high magnetic fields. Our results demonstrate that temperature-dependent magnetospectroscopy is a powerful tool to discriminate trivial and topological insulator phases in HgTe quantum wells.