论文标题
半导体 - 呼吸器异质结构中拓扑阶段的全电学光谱法
All-electrical spectroscopy of topological phases in semiconductor-superconductor heterostructures
论文作者
论文摘要
已经提出，已经提出了超级导体接近的半导体，以支持主持主要结合状态的阶段。当系统经历向Majorana阶段的拓扑相过渡时，光谱差距会闭合，然后重新打开，并倒入准粒子带自旋极化。我们专注于两个范式的半导体 - 螺旋体异质结构，并提出了对拓扑转变时旋转反转敏感的全电向光谱探针。我们的建议依赖于时间依赖的电场与电子自旋的间接耦合，这是由于半导体中强烈的Rashba自旋轨道耦合。我们在线性响应理论中分析了动态相关函数，并证明了易感性的某些组成部分可用于检测非平凡的拓扑阶段。
Semiconductors in the proximity of superconductors have been proposed to support phases hosting Majorana bound states. When the systems undergo a topological phase transition towards the Majorana phase, the spectral gap closes, then reopens, and the quasiparticle band spin polarization is inverted. We focus on two paradigmatic semiconductor-superconductor heterostructures and propose an all-electrical spectroscopic probe sensitive to the spin inversion at the topological transition. Our proposal relies on the indirect coupling of a time-dependent electric field to the electronic spin due to the strong Rashba spin-orbit coupling in the semiconductor. We analyze within linear response theory the dynamical correlation functions and demonstrate that some components of the susceptibility can be used to detect the nontrivial topological phases.
