论文标题
多端半导体 - 驱动器设备的电导矩阵对称性
Conductance matrix symmetries of multiterminal semiconductor-superconductor devices
论文作者
论文摘要
多性半导体 - 螺旋体杂交设备的非局部隧道光谱是研究母体超导差距下方的Andreev结合状态的强大工具。我们研究了如何利用系统的显微镜和几何符号对称性，以在静电电势景观的假设下从多性电气或热电差异电导矩阵中提取正常和Andreev的传输概率，独立于偏置电压，以及缺乏泄漏电流。这些假设导致电导矩阵上的几个对称关系。接下来，通过考虑具有旋转轨道耦合的临近半导体线的数值模型，并在其末端进行了两个正常的接触，我们展示了如何使用这种对称性来识别Rashba verselhaus spinelhaus Spin-Orbit耦合的方向和相对强度。最后，我们研究了电压偏置依赖性静电电位以及准粒子泄漏如何破坏派生的对称关系并研究这两个贡献的特征特征。
Nonlocal tunneling spectroscopy of multiterminal semiconductor-superconductor hybrid devices is a powerful tool to investigate the Andreev bound states below the parent superconducting gap. We examine how to exploit both microscopic and geometrical symmetries of the system to extract information on the normal and Andreev transmission probabilities from the multiterminal electric or thermoelectric differential conductance matrix under the assumption of an electrostatic potential landscape independent of the bias voltages, as well as the absence of leakage currents. These assumptions lead to several symmetry relations on the conductance matrix. Next, by considering a numerical model of a proximitized semiconductor wire with spin-orbit coupling and two normal contacts at its ends, we show how such symmetries can be used to identify the direction and relative strength of Rashba versus Dresselhaus spin-orbit coupling. Finally, we study how a voltage-bias-dependent electrostatic potential as well as quasiparticle leakage break the derived symmetry relations and investigate characteristic signatures of these two contributions.
