posted on 2020-03-05, 19:04authored byJ. J. Gao, J. G. Si, X. Luo, J. Yan, Z. Z. Jiang, W. Wang, C. Q. Xu, X. F. Xu, P. Tong, W. H. Song, X. B. Zhu, W. J. Lu, Y. P. Sun
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.