论文标题
连接长度对INSB-AL纳米线约瑟夫森连接中磁场的超电流弹性对磁场的影响
Impact of junction length on supercurrent resilience against magnetic field in InSb-Al nanowire Josephson junctions
论文作者
论文摘要
半导体的纳米线约瑟夫森连接代表了一个有吸引力的平台，可以通过研究Josephson Supercurrent来研究异常的Josephson效应并检测拓扑超导性。但是，外部磁场通常通过混合纳米线连接抑制超电流，并显着限制了可以研究超电现象的场范围。在这项工作中，我们研究了INSB-Al纳米线约瑟夫森连接对磁场的超电弹性的影响。我们发现，通过降低连接长度可以大大增强超电流的临界平行场。特别是，在30 nm长的连接处，超电流可以持续到1.3 t平行场 - 接近超导膜的临界场。此外，我们将如此短的连接嵌入了超导循环中，并在1 T的平行场上获得了超电流干扰。我们的发现与需要磁场磁场的混合纳米线上的多个实验高度相关。
Semiconducting nanowire Josephson junctions represent an attractive platform to investigate the anomalous Josephson effect and detect topological superconductivity by studying Josephson supercurrent. However, an external magnetic field generally suppresses the supercurrent through hybrid nanowire junctions and significantly limits the field range in which the supercurrent phenomena can be studied. In this work, we investigate the impact of the length of InSb-Al nanowire Josephson junctions on the supercurrent resilience against magnetic fields. We find that the critical parallel field of the supercurrent can be considerably enhanced by reducing the junction length. Particularly, in 30 nm-long junctions supercurrent can persist up to 1.3 T parallel field - approaching the critical field of the superconducting film. Furthermore, we embed such short junctions into a superconducting loop and obtain the supercurrent interference at a parallel field of 1 T. Our findings are highly relevant for multiple experiments on hybrid nanowires requiring a magnetic field-resilient supercurrent.
