Belkov, Vassilij and Ganichev, Sergey and Ivchenko, Eougenious and Tarasenko, Sergey and Weber, Wolfgang and Giglberger, Stephan and Olteanu, M. and Tranitz, H.-P. and Danilov, Sergey and Schneider, Petra and Wegscheider, Werner and Weiss, Dieter and Prettl, Wilhelm (2005) Magneto-Gyrotropic Photogalvanic Effects in Semiconductor Quantum Wells. Proc. 13th Int. Symp. Nanostructures: Physics and Technology, St.Petersburg, Russia.
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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.
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss|
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Wilhelm Prettl
Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev
|Projects:||Graduiertenkolleg Nichtlinearität und Nichtgleichgewicht|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||13 Jan 2010 04:11|