Belkov, Vassilij and Ganichev, Sergey and Ivchenko, Eougenious and Tarasenko, Sergey and Weber, Wolfgang and Giglberger, Stephan and Olteanu, M. and Tranitz, H. and Danilov, Sergey and Schneider, Petra and Wegscheider, Werner
Magneto-gyrotropic photogalvanic effects in semiconductor quantum wells.
Journal of physics: condensed matter 17, pp. 3405-3428.
Other URL: http://www.physik.uni-regensburg.de/forschung/ganichev/reprints/jphyscondmatter2005p3405_mge.pdf
We show that free-carrier (Drude) absorption of both polarized and unpolarized terahertz radiation in quantum well (QW) structures causes an electric photocurrent in the presence of an in-plane magnetic field. Experimental
and theoretical analysis evidences that the observed photocurrents are spin dependent and related to the gyrotropy of the QWs. Microscopic models for the photogalvanic effects in QWs based on asymmetry of photoexcitation and relaxation processes are proposed. In most of the investigated structures the observed magneto-induced photocurrents are caused by spin-dependent
relaxation of non-equilibrium carriers.