论文标题

来自琐碎电子带的拓扑超导涡流

Topological Superconducting Vortex From Trivial Electronic Bands

论文作者

Hu, Lun-Hui, Zhang, Rui-Xing

论文摘要

超导涡流是限制非阿布莱亚主要的准颗粒的有希望的陷阱。人们普遍认为,正常状态或超导态波形的散装拓扑对于在固态系统中启用MajoraNA零模式至关重要。这种普遍的信念已在固有的拓扑超导体或琐碎的超导拓扑材料中塑造了Majorana模式的两个主要搜索方向。在这里,我们表明,携带主要的超导涡流不是散装拓扑的独特之处,而是拓扑上的量子材料也可能引起。我们预测,超导HGTE级材料中的微不足道带负责诱导异常的涡旋拓扑物理学,这些物理学超出了任何现有的理论范式。还讨论了应变控制的主要工程和涡流Majorana模式的实验签名的可行方案。我们的工作为一般超导体中的基于涡流的Majorana搜索提供了新的指南。

Superconducting vortices are promising traps to confine non-Abelian Majorana quasi-particles. It has been widely believed that bulk-state topology, of either normal-state or superconducting ground-state wavefunctions, is crucial for enabling Majorana zero modes in solid-state systems. This common belief has shaped two major search directions for Majorana modes, in either intrinsic topological superconductors or trivially superconducting topological materials. Here we show that Majorana-carrying superconducting vortex is not exclusive to bulk-state topology, but can arise from topologically trivial quantum materials as well. We predict that the trivial bands in superconducting HgTe-class materials are responsible for inducing anomalous vortex topological physics that goes beyond any existing theoretical paradigms. A feasible scheme of strain-controlled Majorana engineering and experimental signatures for vortex Majorana modes are also discussed. Our work provides new guidelines for vortex-based Majorana search in general superconductors.

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