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.

我们报告了TaC单晶的合成和物理性能，提出了将TaC单晶保持拓扑带结构作为拓扑超导体（TSC）候选物的建议。进行了磁化，电阻率和比热测量，结果表明TaC是块状超导体，临界温度为10.3K。TaC是强耦合的II型超导体，超导状态可以用s波Bardeen–Cooper–Schrieffer理论很好地描述。有一个空白。上临界场（H _c2TaC）显示出线性温度依赖性，这与大多数常规超导体和等结构NbC完全不同，后者被建议用来显示拓扑结环或II型Dirac点以及超导性。我们的结果表明TaC将成为TSC进一步研究的新候选者。