Superlinear Photogalvanic Effects in (Bi0.3Sb0.7)2(Te0.1Se0.9)3: Probing Three-Dimensional Topological Insulator Surface States at Room Temperature

URN to cite this document:: urn:nbn:de:bvb:355-epub-537988
DOI to cite this document:: 10.5283/epub.53798

Danilov, Sergey N.

; Golub, Leonid E.

; Mayer, T. ; Beer, A.

; Binder, Stefan

; Mönch, E. ; Minár, J. ; Kronseder, Matthias

; Back, Christian H.

; Bougeard, Dominique

; Ganichev, Sergey D.

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Date of publication of this fulltext: 15 Feb 2023 16:44

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Abstract

We report on the observation of a complex nonlinear intensity dependence of the circular and linear photogalvanic currents induced by infrared radiation in compensated (Bi0.3Sb0.7)(2) (Te0.1Se0.9)(3) three-dimensional topological insulators. The photocurrents are induced by direct optical transitions between topological surface and bulk states. We show that an increase in the radiation intensity ...