论文标题
石墨烯中超级流的自旋轨道增强鲁棒性
Spin-orbit-enhanced robustness of supercurrent in graphene/WS$_2$ Josephson junctions
论文作者
论文摘要
我们通过基于石墨烯的约瑟夫森连接体证明了超电流的鲁棒性，其中诱导了强旋转轨道相互作用（SOIS）。我们比较了高磁场在Josephson连接处与石墨烯与六边形硼氮化物和石墨烯上的高磁场在WS $ _2 $上的持续性，在六角形硼氮化物和石墨烯上，通过接近效应诱导了强SOI。我们发现，在最短的连接中，两个系统都显示出诱导超导性的特征，其特征是在低电源的低电场处抑制了差分电阻，最多为1 t。但是，在较长的连接中，只有ws $ _2 $上的石墨烯在如此高的磁场中持续了诱导的超导性特征，这些磁场甚至可以持续到7 t。边缘状态由WS $ _2 $在石墨烯中引起的强大大量稳定。
We demonstrate enhanced robustness of the supercurrent through graphene-based Josephson junctions in which strong spin-orbit interactions (SOIs) are induced. We compare the persistence of a supercurrent at high magnetic fields between Josephson junctions with graphene on hexagonal boron-nitride and graphene on WS$_2$, where strong SOIs are induced via the proximity effect. We find that in the shortest junctions both systems display signatures of induced superconductivity, characterized by a suppressed differential resistance at a low current, in magnetic fields up to 1 T. In longer junctions however, only graphene on WS$_2$ exhibits induced superconductivity features in such high magnetic fields, and they even persist up to 7 T. We argue that these robust superconducting signatures arise from quasi-ballistic edge states stabilized by the strong SOIs induced in graphene by WS$_2$.
