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Magneto-Gyrotropic Photogalvanic Effects in Semiconductor Quantum Wells

Belkov, Vassilij ; Ganichev, Sergey ; Ivchenko, Eougenious ; Tarasenko, Sergey ; Weber, Wolfgang ; Giglberger, Stephan ; Olteanu, M. ; Tranitz, H.-P. ; Danilov, Sergey ; Schneider, Petra ; Wegscheider, Werner ; Weiss, Dieter ; Prettl, Wilhelm

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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 ...


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