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Apparent PT-symmetric terahertz photoconductivity in the topological phase of Hg1−xCdxTe-based structures

Galeeva, A. V. ; Kazakov, A. S. ; Artamkin, A. I. ; Ryabova, L. I. ; Dvoretsky, S. A. ; Mikhailov, N. N. ; Bannikov, M. I. ; Danilov, S. N. ; Khokhlov, D. R.



Abstract

We show that the terahertz (THz) photoconductivity in the topological phase of Hg1-xCdxTe-based structures exhibits the apparent PT-(parity-time) symmetry whereas the P-symmetry and the T-symmetry, separately, are not conserved. Moreover, it is demonstrated that the P- and T-symmetry breaking may not be related to any type of the sample anisotropy. This result contradicts the apparent symmetry ...

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