A First-principles Prediction of Two-Dimensional Superconductivity in Pristine B2C Single layer
Materials Science
2012-04-10 v1 Superconductivity
Chemical Physics
Abstract
Based on first-principles lattice dynamics and electron-phonon coupling calculations, B2C sheet is predicted to be a two-dimensional (2D) phonon-mediated superconductor with a relatively high transition temperature (Tc). The electron-phonon coupling parameter calculated is 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 is set to 0.10, the estimated temperature Tc is 19.2 K. To be best of our knowledge, B2C is the first pristine 2D superconductor with a Tc higher than the boiling point of liquid helium.
Cite
@article{arxiv.1204.1781,
title = {A First-principles Prediction of Two-Dimensional Superconductivity in Pristine B2C Single layer},
author = {Jun Dai and Zhenyu Li and Jinlong Yang and Jianguo Hou},
journal= {arXiv preprint arXiv:1204.1781},
year = {2012}
}
Comments
accepted by Nanoscale