Superconducting and Topological Properties in Centrosymmetric PbTaS<sub>2</sub> Single Crystals
Jingjing Gao, Jianguo Si, Xuan Luo, Jian Yan, Zhongzhu Jiang, Wei Wang, Chunqiang Xu, Xiaofeng Xu, P. Tong, Wenhai Song, Xuebin Zhu, W. J. Lu, Young Sun
Abstract
We report the superconductivity of PbTaS2 single crystals with the centrosymmetric structure. The systematic measurements of magnetization, electric transport and specific heat indicate that PbTaS2 is a weakly coupled type-II superconductor with transition temperature Tc ∼ 2.6 K. Furthermore, the band structure calculations predicted four nodal lines near the Fermi energy with “drumhead-like” surface states, suggesting centrosymmetric PbTaS2 is a candidate of topological nodal line semimetals. These results demonstrate that PbTaS2 may open up another avenue for further exploring the properties of superconductivity and topological nodal-line states.