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Spin Currents in Diluted Magnetic Semiconductors

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Ganichev, Sergey ; Tarasenko, Sergey ; Belkov, Vassilij ; Olbrich, Peter ; Eder, Wolfgang ; Yakovlev, D. ; Kolkovsky, V. ; Zaleszczyk, W. ; Karczewski, G. ; Wojtowicz, T. ; Weiss, Dieter
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Date of publication of this fulltext: 05 Aug 2009 13:58


We study zero-bias spin separation in (Cd,Mn)Te/(Cd,Mg)Te diluted magnetic semiconductor structures. The spin current generated by electron gas heating under terahertz radiation is converted into a net electric current by applying an external magnetic field. The experiments show that the spin polarization of the magnetic ion system enhances drastically the conversion process due to giant Zeeman splitting of the conduction band and spin-dependent electron scattering on localized Mn2+ ions.

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