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arXiv · 1812.04927

Protective layer enhanced the stability and superconductivity of tailored antimonene bilayer

Jun-Jie Zhang·Yang Zhang·Shuai Dong
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Abstract

For two-dimensional superconductors, the high stability in ambient conditions is critical for experiments and applications. Few-layer antimonene can be non-degradative over a couple of months, which is superior to the akin black phosphorus. Based on the anisotropic Migdal-Eliashberg theory and maximally-localised Wannier functions, this work predicts that electron-doping and Ca-intercalation can transform $\beta$-Sb bilayer from a semimetal to a superconductor. However, the stability of antimonene bilayer in air trends to be decreased due to the electron doping. To overcome this drawback, two kinds of protective layers (graphene and $h$-BN) are proposed to enhance the stability. Interestingly, the superconducting transition temperature will also be enhanced to $9.6$ K, making it a promising candidate as nanoscale superconductor.

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Jun-Jie Zhang, Yang Zhang, Shuai Dong. 2018-12-12. Protective layer enhanced the stability and superconductivity of tailored antimonene bilayer. https://doi.org/10.1103/physrevmaterials.2.126004

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