A first-principles prediction of two-dimensional superconductivity in pristine B2C single layers

2012/01/01 by Jun Dai, Zhenyu Li, Jinlong Yang +1 · 1 citation
Materials Science · Physics and Astronomy · #Boron and Carbon Nanomaterials Research #Superconductivity in MgB2 and Alloys #Thermal properties of materials #cond-mat.mtrl-sci #cond-mat.supr-con #physics.chem-ph

paper · pdf · doi:10.1039/c2nr12018f

accepted by Nanoscale

openalex publication_date 2012/01/01 · arxiv created 2012/04/09 · arxiv updated 2012/04/10 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Based on first-principles lattice dynamics and electron-phonon coupling calculations, B(2)C 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 π character. When the Coulomb pseudopotential, μ*, is set to 0.10, the estimated temperature, T(c), is 19.2 K. To the best of our knowledge, B(2)C is the first pristine 2D superconductor with a T(c) higher than the boiling point of liquid helium.

Citations

• Phonon Dispersion and Electron-Phonon Coupling inMgB2andAlB2
• Special points for Brillouin-zone integrations
• ELF: The Electron Localization Function
• Self-interaction correction to density-functional approximations for many-electron systems
• Transition Temperature of Strong-Coupled Superconductors
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