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29 March 2024
 
  » pubmed » pmid15245041

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Experimental separation of Rashba and Dresselhaus spin splittings in semiconductor quantum wells
S D Ganichev ; V V Bel’kov ; L E Golub ; E L Ivchenko ; Petra Schneider ; S Giglberger ; J Eroms ; J De Boeck ; G Borghs ; W Wegscheider ; D Weiss ; W Prettl ;
Date 25 Jun 2004
Journal Phys Rev Lett, 92 (25 Pt 1), 256601
AbstractThe relative strengths of Rashba and Dresselhaus terms describing the spin-orbit coupling in semiconductor quantum well (QW) structures are extracted from photocurrent measurements on n-type InAs QWs containing a two-dimensional electron gas (2DEG). This novel technique makes use of the angular distribution of the spin-galvanic effect at certain directions of spin orientation in the plane of a QW. The ratio of the relevant Rashba and Dresselhaus coefficients can be deduced directly from experiment and does not relay on theoretically obtained quantities. Thus our experiments open a new way to determine the different contributions to spin-orbit coupling.
Source PubMed, pmid15245041
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