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Pure spin currents induced by spin-dependent scattering processes in SiGe quantum well structures

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Ganichev, Sergey ; Danilov, Sergey ; Bel'kov, V. ; Giglberger, Stephan ; Tarasenko, S. ; Ivchenko, E. ; Weiss, Dieter ; Jantsch, W. ; Schäffler, F. ; Gruber, D. ; Prettl, Wilhelm
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Date of publication of this fulltext: 05 Aug 2009 13:40


We show that spin-dependent electron-phonon interaction in the energy relaxation of a two-dimensional electron gas results in equal and oppositely directed currents in the spin-up and spin-down subbands yielding a pure spin current. In our experiments on SiGe heterostructures the pure spin current is converted into an electric current applying a magnetic field that lifts the cancellation of the ...


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