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Terahertz electron transport in a two-dimensional topological insulator in a HgTe quantum well

Kvon, Z. D. ; Dantscher, K. M. ; Zoth, C. ; Kozlov, D. A. ; Mikhailov, N. N. ; Dvoretsky, S. A. ; Ganichev, Sergey



Abstract

The terahertz response of a two-dimensional topological insulator in a HgTe quantum well to radiation with wavelengths of 118 and 184 μm is investigated. It is found that the photoconductivity is rather high (up to a few percent of dark conductivity) and is manifested in both the local and nonlocal responses of the system. This fact proves that the observed photoconductivity is caused by changes ...

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