Using density functional theory calculations we show that the recently-synthesized, superhard diamond-like BC5 is superconducting with a critical temperature of the same order than that of MgB2. The average electron-phonon coupling is λ=0.89, the phonon-frequency logarithmic-average is <ω>log=67.4 meV and the isotope coefficients are α(C)=0.3 and α(B)=0.2. In BC5, superconductivity is mostly sustained by vibrations of the B atom and its C neighbors.
@article{arxiv.0805.3894,
title = {High T$_c$ superconductivity in superhard diamond-like BC$_{5}$},
author = {Matteo Calandra and Francesco Mauri},
journal= {arXiv preprint arXiv:0805.3894},
year = {2009}
}