Preprint Article Version 1 This version is not peer-reviewed

Experimental Observation of Temperature-Driven Topological Phase Transition in HgTe/CdHgTe Quantum Wells

Version 1 : Received: 28 January 2019 / Approved: 29 January 2019 / Online: 29 January 2019 (16:44:14 CET)

A peer-reviewed article of this Preprint also exists.

Zholudev, M.S.; Kadykov, A.M.; Fadeev, M.A.; Marcinkiewicz, M.; Ruffenach, S.; Consejo, C.; Knap, W.; Torres, J.; Morozov, S.V.; Gavrilenko, V.I.; Mikhailov, N.N.; Dvoretskii, S.A.; Teppe, F. Experimental Observation of Temperature-Driven Topological Phase Transition in HgTe/CdHgTe Quantum Wells. Condens. Matter 2019, 4, 27. Zholudev, M.S.; Kadykov, A.M.; Fadeev, M.A.; Marcinkiewicz, M.; Ruffenach, S.; Consejo, C.; Knap, W.; Torres, J.; Morozov, S.V.; Gavrilenko, V.I.; Mikhailov, N.N.; Dvoretskii, S.A.; Teppe, F. Experimental Observation of Temperature-Driven Topological Phase Transition in HgTe/CdHgTe Quantum Wells. Condens. Matter 2019, 4, 27.

Journal reference: Condens. Matter 2019, 4, 27
DOI: 10.3390/condmat4010027

Abstract

We report on comparison between temperature-dependent magneto¬absorption and magnetotransport spectroscopy of HgTe/CdHgTe quantum wells in terms of detection of phase transition between topological insulator and band insulator states. Our results demonstrate that temperature-dependent magnetospectroscopy is a powerful tool to discriminate trivial and topological insulator phases, yet magnetotransport method is shown to have advantages for clear manifestation of the phase transition with accurate quantitative values of transition parameter (i.e. critical magnetic field Bc).

Subject Areas

topological insulator; phase transition; mercury cadmium telluride; Landau levels; magneto-absorption; magnetotransport

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