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Non-equilibrium electron transport induced by terahertz radiation in the topological and trivial phases of Hg1−xCdxTe

Galeeva, Alexandra V. ; Artamkin, Alexey I. ; Kazakov, Alexey S. ; Danilov, Sergey N. ; Dvoretskiy, Sergey A. ; Mikhailov, Nikolay N. ; Ryabova, Ludmila I. ; Khokhlov, Dmitry R.


Terahertz photoconductivity in heterostructures based on n-type Hg1-xCdxTe epitaxial films both in the topological phase (x < 0.16, inverted band structure, zero band gap) and the trivial state (x > 0.16, normal band structure) has been studied. We show that both the positive photoresponse in films with x < 0.16 and the negative photoconductivity in samples with x > 0.16 have no low-energy ...


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