对称性、声音与手性超导体的探索
Symmetry, Sound, and the Quest for Chiral Superconductors
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中文总结 AI 辅助
本文综述利用弹性模量测量缩小手性拓扑超导体搜索范围的研究，介绍相关序参量与应变耦合知识，讨论重费米子等体系的研究，提出加快搜索的途径与需开发的实验工具。
中文摘要 AI 辅助
确认体拓扑超导体是现代量子材料研究的核心目标，尽管经过数十年探索，仍未发现经证实的实例。主要困难在于，拓扑超导性的多数实验信号模糊且间接。本文综述了利用弹性模量测量缩小手性拓扑超导体搜索范围的研究工作，原则上，这些实验可提供多分量超导性的明确热力学证据，而多分量超导性是二维及准二维材料中手性超导性的必要前提。尽管该方案潜力巨大，但目前结果仍为阴性。本文对多分量序参量、手性拓扑超导体以及超导序参量如何与应变耦合进行了教学性介绍，讨论了重费米子、铁基pnictide和Kagome超导体领域的 ongoing 研究，提出了加快搜索进程的途径，以及为实现该目标应开发的其他实验工具。
英文摘要
The confirmation of a bulk, topological superconductor is a central goal of modern quantum materials research. Despite decades of searching, no confirmed examples yet exist. A primary difficulty is that most experimental signatures of topological superconductivity are ambiguous and indirect. I review efforts to narrow the search for a chiral topological superconductor using measurements of elastic moduli. In principle, these experiments can provide unambiguous thermodynamic evidence for multi-component superconductivity---a pre-requisite for chiral superconductivity in 2D and quasi-2D materials. Despite the potential strength of this program, the results are still negative. I provide a pedagogical introduction to multi-component order parameters, chiral topological superconductivity, and how superconducting order parameters couple to strain. I discuss ongoing efforts in heavy fermion, iron pnictide, and Kagome superconductors, and suggest routes for speeding up the search process, as well as other experimental tools that should be developed for the pursuit of this goal.
