Spin current in p -wave superconducting rings
Spin current in p -wave superconducting rings
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DOI：
10.1103/physrevb.72.092508
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发表时间：
2005-04
影响因子：
3.7
通讯作者：
Y. Asano
中科院分区：
文献类型：
--
作者：
Y. Asano
从超导平均场理论出发，导出了介观超导体中自旋电流的计算公式。自旋流是由$\stackrel{P\vec}{d}$的空间梯度产生的，它代表了自旋三重态超导体的自旋态。本文讨论了零磁场下孤立p波超导环中存在循环自旋流的可能性。自旋流的方向取决于拓扑数，其表征环上$\stackrel{P\vec}{d}$的空间构型。
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 $\stackrel{P\vec}{d}$ 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 $\stackrel{P\vec}{d}$ on the ring.