期刊
NANOSCALE
卷 4, 期 10, 页码 3032-3035出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2nr12018f
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资金
- NSFC [20933006, 91021004, 21173202]
- National Key Basic Research Program [2011CB921404]
- Fundamental Research Funds for the Central Universities
- USTCSCC
- SCCAS
- Shanghai Supercomputer Center
Based on first-principles lattice dynamics and electron-phonon coupling calculations, B2C sheets are predicted to be a two-dimensional (2D) phonon-mediated superconductors with a relatively high transition temperature (T-c). The electron-phonon coupling parameter was calculated to be 0.92 and it is mainly contributed by low frequency out-of-plane phonon modes and electronic states with a pi character. When the Coulomb pseudopotential, mu*, is set to 0.10, the estimated temperature, T-c, is 19.2 K. To the best of our knowledge, B2C is the first pristine 2D superconductor with a T-c higher than the boiling point of liquid helium.
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