论文标题
二维孔气体SNS连接中的旋转轨道耦合和平面齐曼场对临界电流的影响
Effects of spin-orbit coupling and in-plane Zeeman fields on the critical current in two-dimensional hole gas SNS junctions
论文作者
论文摘要
超导型 - 流行杂种设备目前正在引起极大的关注，这是因为强烈的自旋 - 轨道相互作用与诱导的超导性相结合可以导致外来物理学，并可能在耐断层耐足的量子计算中使用潜在的应用。但是，这种系统中自旋动力学的详细性质通常很强地取决于设备的细节，并且在实验中难以访问。在本文中，我们从理论上研究了一个基于二维孔气体的超级导体 - 正常 - 渗透连接，并带有其他rashba旋转轨道耦合 - 偶联，我们专注于临界电流对施加的平面磁场的方向和幅度的依赖性。我们提出了一个简单的模型，该模型使我们能够系统地研究不同的参数制度，并在所有限制情况下获得数值结果和分析表达式。我们的结果可以作为基于测量的临界电流模式在二维孔气中提取有关详细自旋物理的更多信息的工具。
Superconductor--semiconductor hybrid devices are currently attracting much attention, fueled by the fact that strong spin--orbit interaction in combination with induced superconductivity can lead to exotic physics with potential applications in fault-tolerant quantum computation. The detailed nature of the spin dynamics in such systems is, however, often strongly dependent on device details and hard to access in experiment. In this paper we theoretically investigate a superconductor--normal--superconductor junction based on a two-dimensional hole gas with additional Rashba spin orbit--coupling, and we focus on the dependence of the critical current on the direction and magnitude of an applied in-plane magnetic field. We present a simple model, which allows us to systematically investigate different parameter regimes and obtain both numerical results and analytical expressions for all limiting cases. Our results could serve as a tool for extracting more information about the detailed spin physics in a two-dimensional hole gas based on a measured pattern of critical currents.
