Ganichev, Sergey and Danilov, Sergey and Bel'kov, V. and Giglberger, Stephan and Tarasenko, S. and Ivchenko, E. and Weiss, Dieter and Jantsch, W. and Schaffler, F. and Gruber, D. and Prettl, Wilhelm (2007) Pure spin currents induced by spin-dependent scattering processes in SiGe quantum well structures. Physical Review B 75, p. 155317.
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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 two partial charge flows. A microscopic theory of this effect, taking account of the asymmetry of the relaxation process, is developed and is in good agreement with the experimental data.
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev|
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Wilhelm Prettl
Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss
|Projects:||SFB 689: Spinphänomene in reduzierten Dimensionen|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||15 Nov 2007|
|Last Modified:||17 Nov 2009 04:06|