论文标题
在平面约瑟夫森连接处的主要国家的Skyrmion控制
Skyrmion Control of Majorana States in Planar Josephson Junctions
论文作者
论文摘要
由于拓扑超导性的附加相可调节性，因此平面约瑟夫森连接提供了一个多功能平台，可代表基于纳米线的几何形状的替代品。二维电子气体中手性磁性和超导性的接近性诱导表现出非常明显的承诺，可以操纵拓扑超导性。在这里，我们考虑了一个涉及天际晶体的约瑟夫森结，表明天空的手性磁力可以创建和控制Majoraga绑定状态，而无需固有的Rashba旋转式轨道耦合。有趣的是，我们几何形状中的主要结合状态在交界处的零相差下稳健地实现。 Skyrmion半径是通过磁场或磁各向异性在外部调节的，为Majorana结合状态带来了独特的控制功能。
Planar Josephson junctions provide a versatile platform, alternative to the nanowire-based geometry, for the generation of the Majorana bound states, due to the additional phase tunability of the topological superconductivity. The proximity induction of chiral magnetism and superconductivity in a two-dimensional electron gas showed remarkable promises to manipulate topological superconductivity. Here, we consider a Josephson junction involving a skyrmion crystal and show that the chiral magnetism of the skyrmions can create and control the Majorana bound states without the requirement of an intrinsic Rashba spin-orbit coupling. Interestingly, the Majorana bound states in our geometry are realized robustly at zero phase difference at the junction. The skyrmion radius, being externally tunable by a magnetic field or a magnetic anisotropy, brings a unique control feature for the Majorana bound states.
