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Magnetic Josephson junctions with noncentrosymmetric superconductors

机译:具有非中心对称超导体的磁性约瑟夫森结

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摘要

We study the dc Josephson effect in a clean noncentrosymmetric superconductor/ferromagnetoncentro-symmetric superconductor junction within the quasiclassical theory of superconductivity. By considering charge and spin currents, we show that in such junctions an exotic Josephson effect can take place, depending on the superconducting pairing state and spin polarization direction. We focus on the importance of spin-triplet/spin-singlet gaps ratio in such systems showing that its value is related to the existence of even and odd high-order harmonics in the charge and spin current-phase relations, and to the possibility of 0-π transitions.
机译:我们在准经典超导理论中研究了干净的非中心对称超导体/铁磁体/非中心对称超导体结中的直流约瑟夫森效应。通过考虑电荷和自旋电流,我们表明在此类结中,可能会发生异乎寻常的约瑟夫森效应,这取决于超导配对状态和自旋极化方向。我们关注自旋三重态/自旋-单态间隙比在此类系统中的重要性,表明其值与电荷和自旋电流-相位关系中偶数和奇数高次谐波的存在有关,并且与0-π过渡。

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