论文标题
跨型约瑟夫森连接处的异常磁干扰暴露于倾斜磁场
Anomalous magnetic interference of cross-type Josephson junctions exposed to oblique magnetic fields
论文作者
论文摘要
理论上研究了跨型约瑟夫森连接的跨型相位差和临界电流，理论上研究了暴露于三维磁场的狭窄和狭窄的超导条。当将XY平面中的三明治型约瑟夫森连接处暴露于平行的磁场HX和HY时，相位差线性地依赖于空间坐标X和Y，并且临界电流表现出标准的Fraunhofer型磁干扰。另一方面，垂直场Hz非线性地调节相位差和临界电流的分布，因为倾斜场的功能表现出异常的磁干扰。我们通过忽略自场和捕获的涡流的影响来获得小型跨型连接的临界电流的简单分析表达式。所得的直流临界电流根据平行和垂直磁场显示出异常和多样的干扰模式
Gauge-invariant phase difference and critical currents of cross-type Josephson junctions with thin and narrow superconducting strips exposed to three-dimensional magnetic fields are theoretically investigated. When a sandwich-type Josephson junction in the xy plane is exposed to parallel magnetic fields Hx and Hy, the phase difference linearly depends on the spatial coordinates, x and y, and the critical currents exhibit the standard Fraunhofer-type magnetic interference. The perpendicular field Hz, on the other hand, nonlinearly modulates the distribution of the phase difference and the critical currents as the functions of the oblique field exhibit anomalous magnetic interference. We obtain simple analytical expressions for critical currents of small cross-type junctions by neglecting the effects of self-field and trapped vortices. The resulting dc critical currents show anomalous and diverse interference patterns depending on the parallel and perpendicular magnetic fields
