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

Maksim Zholudev; Aleksandr Kadykov; Mikhail Fadeev; Michal Marcinkiewicz; Sandra Ruffenach; Christophe Consejo; Wojciech Knap; Jeremie Torres; Sergey Morozov; Vladimir Gavrilenko; Nikolay Mikhailov; Sergey Dvoretskii; Frederic Teppe

doi:10.20944/preprints201901.0295.v1

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).

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

Abstract

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