论文标题
基于铁的超导体薄膜的固有时间反转拓扑超导性
Intrinsic Time-reversal-invariant Topological Superconductivity in Thin Films of Iron-based Superconductors
论文作者
论文摘要
我们建立了基于铁的超导体（FESC）的准二维薄膜（FESC）作为一个新的高温平台，用于托管固有的固有时间反转的螺旋式拓扑超导性（TSC）。基于狄拉克表面状态和大量扩展的$ s $波配对的组合，我们的理论应直接适用于大量实验建立的FESC，并打开新的TSC范式。特别是，在FESC薄膜中，应用的电场是螺旋Majorana Edge模式的“拓扑开关”，可以实验对栅极控制的螺旋螺旋主要电路的实验可行设计。应用平面磁场将螺旋TSC相驱动到携带角落位置的Majora零模式的高阶TSC中。我们的建议应能够实现螺旋主要植物的实验。
We establish quasi-two-dimensional thin films of iron-based superconductors (FeSCs) as a new high-temperature platform for hosting intrinsic time-reversal-invariant helical topological superconductivity (TSC). Based on the combination of Dirac surface state and bulk extended $s$-wave pairing, our theory should be directly applicable to a large class of experimentally established FeSCs, opening a new TSC paradigm. In particular, an applied electric field serves as a "topological switch" for helical Majorana edge modes in FeSC thin films, allowing for an experimentally feasible design of gate-controlled helical Majorana circuits. Applying an in-plane magnetic field drives the helical TSC phase into a higher-order TSC carrying corner-localized Majorana zero modes. Our proposal should enable the experimental realization of helical Majorana fermions.
