论文标题
自旋分裂超导体/拓扑绝缘子连接器中无野外异常结和超导二极管效应
Field-free anomalous junction and superconducting diode effect in spin split superconductor/topological insulator junctions
论文作者
论文摘要
我们研究了由超导体 - 有限磁绝缘子双层（FIS）在3D拓扑绝缘子（TI）顶部由两个自旋分裂超导体（FIS）制成的两个自旋分裂超导体之间的传输特性。我们得出了相应的USADEL方程，这些方程描述了这些系统中的准经典绿色功能，并首先在弱Ximity情况下分析求解方程。在没有外部磁场的情况下，我们证明了异常相的外观。我们还探索了非转录电子传输。具体而言，我们通过求解USADEL方程来计算结合接口的二极管效率$η$。即使在零施加的磁场下，我们也会获得相当大的二极管效应。我们讨论二极管效率$η$如何取决于不同的参数，并在温度下找到$η$的非单调行为。
We study the transport properties of a diffusive Josephson junction between two spin-split superconductors made of superconductor-ferromagnetic insulator bilayers (FIS) on top of a 3D topological insulator (TI). We derive the corresponding Usadel equation describing the quasiclassical Green's functions in these systems and first solve the equation analytically in the weak-proximity case. We demonstrate the appearance of an anomalous phase in the absence of an external magnetic field. We also explore non-reciprocal electronic transport. Specifically, we calculate the junction's diode efficiency $η$ by solving the Usadel equation. We obtain a sizable diode effect even at zero applied magnetic field. We discuss how the diode efficiency $η$ depends on the different parameters and find a non-monotonic behavior of $η$ with temperature.
