Removal of spin-degenerancy in p-SiGe quantum wells demonstrated by spin-photocurrents

DOI to cite this document:: 10.5283/epub.1348

Ganichev, Sergey ; Rössler, Ulrich ; Prettl, Wilhelm ; Ivchenko, E. ; Belkov, Vassilij ; Neumann, Richard ; Brunner, K. ; Abstreiter, Gerhard

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Date of publication of this fulltext: 05 Aug 2009 13:28

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Abstract

Spin photocurrents requiring a system lacking inversion symmetry, become possible in SiGe based quantum well (QW) structures due to their built-in asymmetry. We report on circular and linear photogalvanic effects induced by infrared radiation in (001)- and (113)-oriented p-Si/Si1-xGex QW structures and analyze the observations in view of the possible symmetry of these structures. The circular ...