Abstract
The dynamics of a nonequilibrium spin system dominated by collisions preserving the total quasimomentum of the interacting electrons and quasiparticles is considered. An analysis of the derived hydrodynamic equations shows that weakly attenuated spin-polarization waves associated with an oscillating drift current can exist in a magnetically inhomogeneous conducting ring. Spin-polarized transport in a ballistic regime of wave propagation through a conductor is also considered, and a simple method is proposed for distinguishing these waves from spin and current oscillations that develop in the hydrodynamic regime. It is shown that a potential difference arises between the leads of an open nonuniformly spin-polarized conductor as a manifestation of spin polarization of electron density. This spin-mediated electrical phenomenon occurs in both hydrodynamic and diffusive limits.
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Original Russian Text © R.N. Gurzhi, A.N. Kalinenko, A.I. Kopeliovich, P.V. Pyshkin, A.V. Yanovsky, 2007, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 132, No. 1, pp. 209–213.
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Gurzhi, R.N., Kalinenko, A.N., Kopeliovich, A.I. et al. Hydrodynamics of spin-polarized transport and spin pendulum. J. Exp. Theor. Phys. 105, 185–189 (2007). https://doi.org/10.1134/S1063776107070412
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DOI: https://doi.org/10.1134/S1063776107070412