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arXiv 0808.0299cond-mat.supr-con
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Josephson Phi结中磁与超导电流的直接耦合

Direct coupling between magnetism and superconducting current in Josephson Phi junction

A. Buzdin

摘要:

研究了具有Rashba型自旋轨道相互作用的常规超导体与磁性正常金属之间的邻近效应。利用唯象的Ginzburg-Landau理论和准经典的Eilenberger方法,证明了以这种金属为弱连接的约瑟夫森结具有特殊的非正弦电流-相位关系。这种结的基态由有限相位差Φ表征,其与正常金属中的自旋-轨道相互作用和交换场的强度成比例。所提出的Φ结形成机制给出了超导电流和弱连接中的磁矩之间的直接耦合。因此,Phi结为超导自旋电子学开辟了有趣的前景。

英文摘要:

We study the proximity effect between conventional superconductor and magnetic normal metal with a spin-orbit interaction of the Rashba type. Using the phenomenological Ginzburg-Landau theory and the quasiclassical Eilenberger approach it is demonstrated that the Josephson junction with such a metal as a weak link has a special non-sinusoidal current-phase relation. The ground state of this junction is caracterized by the finite phase difference Phi, which is proportional to the strength of the spin-orbit interaction and the exchange field in the normal metal. The proposed mechanism of the Phi junction formation gives a direct coupling between the superconducting current and the magnetic moment in the weak link. Therefore the Phi junctions open interesting perspectives for the superconducting spintronics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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