Experimental Observation of Temperature-Driven Topological Phase Transition in HgTe/CdHgTe Quantum Wells
Open Access
- 1 March 2019
- journal article
- research article
- Published by MDPI AG in Condensed Matter
- Vol. 4 (1), 27
- https://doi.org/10.3390/condmat4010027
Abstract
We report on the comparison between temperature-dependent magneto-absorption and magnetotransport spectroscopy of HgTe/CdHgTe quantum wells in terms of the detection of the phase transition between the 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 the magnetotransport method is shown to have advantages for the clear manifestation of the phase transition with accurate quantitative values of the transition parameter (i.e., critical magnetic field Bc).Keywords
Funding Information
- Russian Foundation for Basic Research (18-32-00628, 18-52-16009)
- Ministry of Education and Science of the Russian Federation (SP-5051.2018.5)
- Fundacja na rzecz Nauki Polskiej (MAB/2018/9)
- MIPS department of Montpellier University (Occitanie Térahertz Platform, Gepeto Terahertz platform, Terasens, CATS)
- CNRS (TeraMIR)
- European Regional Development Fund (Smart Growth Operational Programme)
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