论文标题
在非中心对称超导体中，与$ s $ - 波旋转三曲配对的非中心对称超导体中的约瑟夫森耦合和高野马
Anomalous Josephson Coupling and High-Harmonics in Non-Centrosymmetric Superconductors with $S$-wave Spin-Triplet Pairing
论文作者
论文摘要
我们研究了由具有$ S $ - 波轨道轨道对称性对称的自旋三型配对的非中心对称超导体产生的约瑟夫森效应。我们证明，由于反转对称性断裂和自旋轨道相互作用，自旋三序序参数的轨道依赖性特征决定了其在动量空间中的非平凡纹理。这种模式的出现是导致出现异常的约瑟夫森耦合的发生，并且在当前阶段关系中的优势是高荷尔曼语的主导地位。值得注意的是，由于旋转轨道耦合，整个异质结构的电子结构的变化通常可以将连接的基态从0-转变为约瑟夫森相的一般值，从而实现所谓的$φ$ - 结。除非标准的电流相关关系，但最终的临界电流的依赖性提供了最终的约瑟夫森行为的标志。这些发现表明了设计超导轨道设备的设计路径，并解释了氧化物界面超导体中超细电流的几个观察到的异常。
We study the Josephson effects arising in junctions made of non-centrosymmetric superconductors with spin-triplet pairing having $s$-wave orbital-singlet symmetry. We demonstrate that the orbital dependent character of the spin-triplet order parameter determines its non-trivial texture in the momentum space due to the inversion symmetry breaking and spin-orbit interactions. The emergence of this pattern is responsible for the occurrence of an anomalous Josephson coupling and a dominance of high-harmonics in the current phase relation. Remarkably, due to the spin-orbital couplings, variations in the electronic structure across the heterostructure can generally turn the ground state of the junction from 0- to a generic value of the Josephson phase, thus realizing the so-called $φ$-junction. Hallmarks of the resulting Josephson behavior, apart from non-standard current-phase relation, are provided by an unconventional temperature and magnetic field dependence of the critical current. These findings indicate the path for the design of superconducting orbitronics devices and account for several observed anomalies of the supercurrent in oxide interface superconductors.
