Removal of spin degeneracy in SiGe-based nanostructures

Sergey D. Ganichev; U. Roessler; Wilhelm Prettl; E. L. Ivchenko; Vassilij V. Bel'kov; R. Neumann; K. Brunner; Gerhard Abstreiter

doi:10.1117/12.513609

11 June 2003 Removal of spin degeneracy in SiGe-based nanostructures

Sergey D. Ganichev, U. Roessler, Wilhelm Prettl, E. L. Ivchenko, Vassilij V. Bel'kov, R. Neumann, K. Brunner, Gerhard Abstreiter

Author Affiliations +

Proceedings Volume 5023, 10th International Symposium on Nanostructures: Physics and Technology; (2003) https://doi.org/10.1117/12.513609
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

Abstract

The photogalvanic effects, which require a system lacking inversion symmetry, become possible in SiGe based quantum well (QW) structures due to their built-in asymmetry. We report on the removal of spin degeneracy in the k-space of SiGe nanostructures. This is concluded from the observations of the circular photogalvanic effect induced by infrared radiation in asymmetric p-type QWs. We discuss possible mechanisms that give rise to spin-splitting of the electronic subband states.

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Sergey D. Ganichev, U. Roessler, Wilhelm Prettl, E. L. Ivchenko, Vassilij V. Bel'kov, R. Neumann, K. Brunner, and Gerhard Abstreiter "Removal of spin degeneracy in SiGe-based nanostructures", Proc. SPIE 5023, 10th International Symposium on Nanostructures: Physics and Technology, (11 June 2003); https://doi.org/10.1117/12.513609

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