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Spin-galvanic effect due to optical spin orientation

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), 081302. - - -.

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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
Authors :
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
Prettl, W
Date : 11 March 2003
DOI : 10.1103/PhysRevB.68.081302
Related URLs :
Additional Information : Copyright 2003 The American Physical Society.
Depositing User : Symplectic Elements
Date Deposited : 27 Sep 2012 08:54
Last Modified : 31 Oct 2017 14:39

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