Superconducting and Topological Properties in Centrosymmetric PbTaS2 Single Crystals

Authors :: Gao, J. J.
Si, J. G.
Luo, X.
Yan, J.
Jiang, Z. Z.
Wang, W.
Xu, C. Q.
Xu, X. F.
Tong, P.
Song, W. H.
Zhu, X. B.
Lu, W. J.
Sun, Y. P.
Source :: JOURNAL OF PHYSICAL CHEMISTRY C 2020, 124, 11, 6349
Publication Year :: 2020
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.<br />Comment: 21 pages, 3 figures, 1 table

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