高$T_c$材料的拓扑物理指示
Indications for Topological Physics in High-$T_c$ Materials
摘要：
对高$T_c$超导体的研究一般不集中于分析这些材料中电子能带的拓扑结构。在这篇文章中，我们整理和讨论几个著名的实验观测信号，某些签名的拓扑可能存在。实验表明的拓扑特征包括降维、由环统计确定的电子输运、缠绕数、外尔费米子等。我们认为，拓扑结构，在更广泛的意义上比带拓扑结构，可能是关键的机制，高$T_c$超导。
英文摘要：
Research on high-$T_c$ superconductors has generally not focused on analysis of the topological structure of electronic bands in these materials. In this article we collate and discuss several well-known experimental observables that signal that certain signatures of topology may be present. The topological signatures suggested by experiment include dimensional reduction, electronic transport determined by loop statistics, a winding number, Weyl fermions, and others. We suggest that topology, in a wider sense than band topology, may be key to the mechanism of high-$T_c$ superconductivity.
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