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Research Article

Superconducting properties and topological nodal lines features in centrosymmetric Sn0.5TaSe2

Mukhtar L. Adam1,2,3, Zhanfeng Liu1, Oyawale A. Moses1, Xiaojun Wu2( ), Li Song1( )
National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Strongly Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230029, China
Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Synergetic Innovation of Quantum Information & Quantum Technology, School of Chemistry and Materials Sciences, and CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230026, China
Physics Department, Bayero University, Kano 700231, Nigeria
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Abstract

Nontrivial topological behaviors in superconducting materials provide resourceful ground for the emergence and study of unconventional quantum states. Charge doping by the controlled intercalation of donor atoms is an efficient route for enhancing/inducement of superconducting and topological behaviors in layered topological insulators and semimetals. Herein, we enhanced the superconducting temperature of TaSe2 by 20-folds (~ 3 k) through Sn atoms intercalation. Using first-principles calculations, we demonstrated the existence of nontrivial topological features. Sn0.5TaSe2 displays topological nodal lines around the K high symmetry point in the Brillouin zone, with drumhead-like shaped surface states protected by inversion symmetry. Altogether, the coexistence of these properties makes Sn0.5TaSe2 a potential candidate for topological superconductivity.

Keywords

superconductivitytopological semimetalcharge dopingintercalationfirst-principlessingle-crystals

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Nano Research
Volume 14 Issue 8,
August 2021
Pages 2613-2619
DOI: 10.1007/s12274-020-3262-2
Cite this article:
Adam ML, Liu Z, Moses OA, et al. Superconducting properties and topological nodal lines features in centrosymmetric Sn0.5TaSe2. Nano Research, 2021, 14(8): 2613-2619. https://doi.org/10.1007/s12274-020-3262-2
Topics:
CalculationsQuantum theory Selenium compoundsTantalum compoundsTin compounds

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Received: 30 September 2020
Revised: 23 November 2020
Accepted: 24 November 2020
Published: 23 December 2020
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
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