论文标题
可调约瑟夫森二极管对拓扑绝缘体表面的影响
Tunable Josephson diode effect on the surface of topological insulators
论文作者
论文摘要
约瑟夫森的整流效应，其中电阻在一个方向上是有限的，而另一个方向则是零，最近已通过实验实现。由此产生的约瑟夫森二极管在包括量子计算机在内的超导设备上具有许多潜在的应用。在这里，我们从理论上表明，拓扑绝缘子的二维表面上的超导体非金属 - 高通用二极管二极管具有较大的可调性。二极管质量因子的大小和符号在很大程度上取决于外部磁场，门电压和连接的长度。这种丰富的特性源于多个横向传输通道的不同电流关系之间的相互作用，可用于设计现实的超导二极管设备。
The Josephson rectification effect, where the resistance is finite in one direction while zero in the other, has been recently realized experimentally. The resulting Josephson diode has many potential applications on superconducting devices, including quantum computers. Here, we theoretically show that a superconductor-normal metal-superconductor Josephson junction diode on the two-dimensional surface of a topological insulator has large tunability. The magnitude and sign of the diode quality factor strongly depend on the external magnetic field, gate voltage, and the length of the junction. Such rich properties stem from the interplay between different current-phase relations for the multiple transverse transport channels, and can be used for designing realistic superconducting diode devices.
