Vacuum fluctuations and the spin current in mesoscopic structures with collinear magnetic order
arXiv:cond-mat/0702168 · doi:10.1103/PhysRevB.75.201301
Abstract
We show that in magnetic nanostructures with a homogeneous magnetic order, the equilibrium spin current can be nonzero. For example, this is the case of a wide magnetic ring with the magnetization along the ring axis. The physical reason of this effect is a variation of the orientation of anisotropy axis inducing a spin torque acting on the magnetic ions. The mechanism of the spin current generation is related to the quantum vacuum fluctuations in the magnetic system.
4 pages, 2 figures
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