Ganichev, Sergey and Belkov, Vassilij and Golub, Leonid E. and Ivchenko, Eugenious and Schneider, Petra and Gilberger, S. and Eroms, Jonathan and Boeck, J. De and Borghs, G. and Wegscheider, Werner and Weiss, Dieter and Prettl , Wilhelm
Experimental Separation of Rashba and Dresselhaus Spin Splittings in Semiconductor Quantum Wells.
Physical Review Letters (PRL) 92 (25), p. 256601.
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.