Experimental and first-principles studies of superconductivity in topological nodal line semimetal SnTaS 2

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 P 6 3 / m m c . Electrical resistivity, magnetization and specific heat da...

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Bibliographic Details
Published in:Superconductor science & technology 2022-06, Vol.35 (6), p.64001
Main Authors: Ash, Soumen, Naskar, Moumita, P N, Ravi Shankar, Jena, Nityasagar, Sundaresan, A, Ganguli, Ashok Kumar
Format: Article
Language:English
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Summary: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 P 6 3 / m m c . Electrical resistivity, magnetization and specific heat data suggest SnTaS 2 to be a weakly coupled, type-II superconductor with T c ≈ 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. Superconductivity in layered SnTaS 2 with nodal line topological state makes it a strong candidate to be considered for a 3D topological superconductor.
ISSN:0953-2048
1361-6668
DOI:10.1088/1361-6668/ac5aa8