期刊
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
卷 34, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6668/abdcc3
关键词
s-wave BCS; topological superconductor; single crystal
资金
- Beijing Natural Science Foundation [Z180008]
- National Natural Science Foundation of China [11774399, 1200416]
- Fund of Science and Technology on Surface Physics and Chemistry Laboratory [201901SY00900102]
- National Key Research and Development Program of China [2017YFA0302901, 2016YFA0300604]
- K C Wong Education Foundation [GJTD-2018-01]
- China Postdoctoral Science Foundation [2020M670504]
We report the synthesis and physical properties of single crystals of TaC, a proposed topological superconductor candidate with a critical temperature of 10.3 K. TaC is a bulk superconductor described by s-wave BCS theory with a single gap, and exhibits linear temperature dependence in the upper critical field (H-c2), distinguishing it from most conventional superconductors. This suggests TaC as a new candidate for further research in topological superconductors.
We report the synthesis and physical properties of the single crystals of TaC, which are proposed to hold topological band structure as a topological superconductor (TSC) candidate. Magnetization, resistivity and specific heat measurements are performed and indicate that TaC is bulk superconductor with critical temperature of 10.3 K. TaC is a strongly coupled type-II superconductor and the superconducting state can be well described by s-wave Bardeen-Cooper-Schrieffer theory with a single gap. The upper critical field (H-c2) of TaC shows linear temperature dependence, which is quite different from most conventional superconductors and isostructural NbC, which is proposed to manifest topological nodal-loops or type-II Dirac points as well as superconductivity. Our results suggest that TaC would be a new candidate for further research of TSCs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据