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Evidence and evaluation of the Bychkov-Rashba effect in SiGe/Si/SiGe quantum wells

DOI to cite this document:
Wilamowski, Zbyslaw ; Jantsch, Wolfgang ; Malissa, Hans ; Rössler, Ulrich
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Date of publication of this fulltext: 05 Aug 2009 13:28


From spin resonance of two-dimensional (2D) conduction electrons in a modulation doped SiGe/Si/SiGe quantum well structure we find a 2D anisotropy of both the line broadening (dephasing time) and the g factor. Both can be explained consistently employing the Bychkov-Rashba (BR) term H_BR = alpha(k×sigma)·ez, which turns out here to be the dominant coupling between electron orbital motion and ...


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