Spin-galvanic effect due to optical spin orientation
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Ganichev, SD, Schneider, P, Bel'kov, VV, Ivchenko, EL, Tarasenko, SA, Wegscheider, W, Weiss, D, Schuh, D, Murdin, BN, Phillips, PJ, Pidgeon, CR, Clarke, DG, Merrick, M, Murzyn, P, Beregulin, EV and Prettl, W (2003) Spin-galvanic effect due to optical spin orientation Physical Review B, 68 (8). - - -.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.68.081302
Abstract
Under oblique incidence of circularly polarized infrared radiation the spin-galvanic effect has been unambiguously observed in (001)-grown $n$-type GaAs quantum well (QW) structures in the absence of any external magnetic field. Resonant inter-subband transitions have been obtained making use of the tunability of the free-electron laser FELIX. It is shown that a helicity dependent photocurrent along one of the $<110>$ axes is predominantly contributed by the spin-galvanic effect while that along the perpendicular in-plane axis is mainly due to the circular photogalvanic effect. This strong non-equivalence of the [110] and [1$\bar{1}$0] directions is determined by the interplay between bulk and structural inversion asymmetries. A microscopic theory of the spin-galvanic effect for direct inter-subband optical transitions has been developed being in good agreement with experimental findings.
| Item Type: | Article |
|---|---|
| Divisions: | Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Photonics Faculty of Engineering and Physical Sciences > Physics |
| Related URLs: | |
| ID Code: | 7884 |
| Deposited By: | Symplectic Elements |
| Deposited On: | 17 Nov 2011 11:44 |
| Last Modified: | 25 Apr 2013 12:43 |
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