journal article·2022-04-26

First-Principles Prediction of Superconductivity in High-Buckled Two-Dimensional Tin

Chao Liu, Peng-Fei Liu, Xin-Hai Tu, Ling Shang, Ping Zhang, Wei Ren, Bao-Tian Wang

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Abstract

Two-dimensional (2D) superconductors exhibit a variety of fascinating phenomena such as the Kosterlitz–Thouless–Berezinskii transition, electron quantum confinement effect, charge density wave, and topologically non-trivial band. Until now, the superconductivity of a classical elemental 2D system of tin has not yet been confirmed. Herein, using the microscopic theory of Bardeen, Cooper, and Schrieffer (BCS) and density functional theory calculations, we meticulously study the electron–phonon coupling, electronic structures, and phase transition of low-buckled (LB) stanene and high-buckled (HB) 2D tin. We demonstrate that the HB 2D tin exhibits remarkable multi-gap electron–phonon coupling superconductivity with critical temperatures approximating those of the conventional bulk tin and few-layer LB stanene. Our results clearly show the strain-induced transitions of the orbital occupation, band structure, and superconductivity from LB to HB structures. Our discovery of HB 2D tin as an excellent 2D superconductor should stimulate the experimental synthesis and characterization of its superconducting properties.
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Research context

OpenAlex topics: Graphene research and applications · Topological Materials and Phenomena · 2D Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Physics Department, State Key Laboratory of Advanced Special Steel, Materials Genome Institute, Shanghai University, Shanghai 200444, China

International Centre of Quantum and Molecular Structures, Shanghai Key Laboratory of High Temperature Superconductors, Shanghai University, Shanghai 200444, China

Spallation Neutron Source Science Center, Dongguan 523803, China

School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China

Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China

Funding

Shanghai University · State Key Laboratory of Advanced Special Steel · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · Program of State Key Laboratory of Quantum Optics and Quantum Optics Devices · Science Challenge Project

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