Spin currents in diluted magnetic semiconductors (extended version)

Abstract

Spin currents resulting in the zero-bias spin separation have been observed in unbiased diluted magnetic semiconductor structures (Cd,Mn)Te/(Cd,Mg)Te. The pure spin current generated due to the electron gas heating by terahertz radiation is converted into a net electric current by application of an external magnetic field. We demonstrate that polarization of the magnetic ion system enhances drastically the conversion due to the spin-dependent scattering by localized Mn(2+) ions and the giant Zeeman splitting.

arXiv comment6 pages, 4 figures

References in corpus (8)

• Semiconductor Spintronics
• Pure spin current from one-photon absorption of linearly polarized light in noncentrosymmetric semiconductors
• Zero-bias spin separation
• Ising Quantum Hall Ferromagnet in Magnetically Doped Quantum Wells
• Pure spin photocurrents in low-dimensional structures
• Spin polarizations and spin Hall currents in a two-dimensional electron gas with magnetic impurities
• Engineering of spin-lattice relaxation dynamics by digital growth of diluted magnetic semiconductor CdMnTe
• Magneto-optics of two-dimensional electron gases modified by strong Coulomb interactions in ZnSe quantum wells

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• Enhanced spin Hall effect in strong magnetic disorder