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Symmetry breaking and circular photogalvanic effect in epitaxial CdxHg1-xTe films

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Hubmann, Stefan ; Budkin, G. V. ; Otteneder, M. ; But, D. ; Sacré, Daniel ; Yahniuk, I. ; Diendorfer, K ; Bel'kov, V. V. ; Kozlov, D. A. ; Mikhailov, N. N. ; Dvoretsky, S. A. ; Varavin, V. S. ; Remesnik, V. G. ; Tarasenko, S. A. ; Knap, W. ; Ganichev, Sergey
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Date of publication of this fulltext: 20 Aug 2020 05:16


We report on the observation of symmetry breaking and the circular photogalvanic effect in CdxHg1-xTe alloys. We demonstrate that irradiation of bulk epitaxial films with circularly polarized terahertz radiation leads to the circular photogalvanic effect (CPGE) yielding a photocurrent whose direction reverses upon switching the photon helicity. This effect is forbidden in bulk zinc-blende ...


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