<back> Last update: 07.02.2005

    Experimental Separation of Rashba and Dresselhaus Spin Splittings
in Semiconductor Quantum Wells

S. D. Ganichev*, V.V. Belíkov**, L. E. Golub**, E. L. Ivchenko**, Petra Schneider*, S. Giglberger*, J. Eroms*, J. De Boeck***, G. Borghs***, W.Wegscheider*, D.Weiss*, and W. Prettl*

* Fakult¨at Physik, University of Regensburg, 93040, Regensburg, Germany and
** A.F. Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
*** IMEC, Kapeldreef 75, B-3001 Leuven, Belgium

(Dated: June 23, 2004)


The 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.. (PDF)