Power-Law Temperature Dependence of the Penetration Depth in a Topological Superconductor Due to Surface States.,Physical Review Letters

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Power-Law Temperature Dependence of the Penetration Depth in a Topological Superconductor Due to Surface States.
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-02-14 , DOI: 10.1103/physrevlett.124.067001
Tsz Chun Wu ₁ , Hridis K Pal ₂ , Pavan Hosur ₃ , Matthew S Foster _{1,

4}

Affiliation

We study the temperature dependence of the magnetic penetration depth in a 3D topological superconductor (TSC), incorporating the paramagnetic current due to the surface states. A TSC is predicted to host a gapless 2D surface Majorana fluid. In addition to the bulk-dominated London response, we identify a T^{3} power-law-in-temperature contribution from the surface, valid in the low-temperature limit. Our system is fully gapped in the bulk, and should be compared to bulk nodal superconductivity, which also exhibits power-law behavior. Power-law temperature dependence of the penetration depth can be one indicator of topological superconductivity.

中文翻译：

由于表面状态而导致的拓扑超导体中穿透深度的幂律温度依赖性。

我们研究了3D拓扑超导体（TSC）中磁渗透深度的温度依赖性，并结合了由于表面状态而产生的顺磁电流。预计TSC将容纳无间隙2D表面Majorana流体。除了以伦敦为主的响应外，我们还从表面确定了T ^ {3}幂律温度贡献，在低温极限内有效。我们的系统在体积上有很大的空隙，应该与体积节点超导性进行比较，后者也表现出幂律特性。穿透深度的幂律温度依赖性可能是拓扑超导性的指标。

更新日期：2020-02-14

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