论文标题
拓扑结节线半微分SNTA $ _2 $中超导性的实验和第一原理研究
Experimental and first-principles studies of superconductivity in topological nodal line semimetal SnTaS$_2$
论文作者
论文摘要
我们报告了使用电气传输，磁化和热容量测量值的多晶SNTAS $ _2 $中超导性的详细研究。 SNTA $ _2 $与空间群体$ p6_3/mmc $结晶的中心对称六角形结构。电阻率，磁化和特定的热数据表明SNTAS $ _2 $是弱耦合的II型超导体，$ t_c \约$ 2.8 k \ $ 2.8 k。第一原则计算显示了鼻线拓扑的签名，该签名是由电子带结构中的nodal线拓扑签名，受到空间和时间的交流，并受到旋转的旋转，并受到旋转的旋转，并受到旋转的旋转。 （SOC）。带有节点线拓扑状态的分层SNTA $ _2 $中的超导性使其成为3D拓扑超导体的强大候选者。
We report a detailed study of superconductivity in polycrystalline SnTaS$_2$ using electrical transport, magnetization and heat capacity measurements. SnTaS$_2$ crystallizes in centrosymmetric hexagonal structure with space group $P6_3/mmc$. Electrical resistivity, magnetization and specific heat data suggest SnTaS$_2$ to be a weakly coupled, type-II superconductor with $T_c \approx$ 2.8 K. First-principles calculations show signature for nodal line topology in the electronic band structure, protected by the spatial-inversion and time-reversal symmetries, that strongly gapped out by the inclusion of spin-orbit coupling (SOC). Superconductivity in layered SnTaS$_2$ with nodal line topological state makes it a strong candidate to be considered for a 3D topological superconductor.
