论文标题
约瑟夫森效应激发性手性双层
Josephson effect in excitonic chiral double layers
论文作者
论文摘要
考虑到两种手性金属的电子孔双层中的S波配对，我们研究了域壁产生的约瑟夫森效应。后者是由顺序参数阶段的跳跃引起的，在特殊点创建了两个独立的evanevancent零能量模式。通过连续性方程将准粒子电流耦合到超电流，可以找到独特的解决方案。这导致了零能量模式的叠加，其中系数的相对相与宏观超电流的方向相关。假设有带环状的几何形状，有效的约瑟夫森电流周围绕着域壁。这样的系统可以实现为环形拓扑绝缘子的表面。
Considering s-wave pairing in an electron-hole double layer of two chiral metals, we study the Josephson effect generated by a domain wall. The latter, which is caused by a jump of the order parameter phase, creates two independent evanescent zero-energy modes at an exceptional point. A unique solution is found by coupling the quasiparticle currents to the supercurrents via the continuity equation. This leads to a superposition of the zero-energy modes, where the relative phases of the coefficients are linked to the direction of the macroscopic supercurrents. Assuming a toroidal geometry, the effective Josephson current winds around the domain walls. Such a system can be realized as the surface of a ring-shaped topological insulator.
