Spin currents in diluted magnetic semiconductors

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 polari...

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Bibliographic Details
Published in:Physical review letters 2009-04, Vol.102 (15), p.156602-156602, Article 156602
Main Authors: Ganichev, S D, Tarasenko, S A, Bel'kov, V V, Olbrich, P, Eder, W, Yakovlev, D R, Kolkovsky, V, Zaleszczyk, W, Karczewski, G, Wojtowicz, T, Weiss, D
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Language:English
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Summary: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 Mn(2+) ions.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.102.156602