Spin current in p-wave superconducting rings
Yasuhiro Asano
DOI 10.1103/PhysRevB.72.092508 · Physical Review B
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Abstract
A formula of spin currents in mesoscopic superconductors is derived from the mean-field theory of superconductivity. Spin flow is generated by spatial gradient of d⃗ which represents a spin state of spin-triplet superconductors. We discuss a possibility of circulating spin currents in isolated p-wave superconducting rings at the zero magnetic field. The direction of spin currents depends on topological numbers which characterize spatial configurations of d⃗ on the ring.
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