Doped graphane: a prototype high-Tc electron-phonon superconductor
We show by first-principles calculations that p-doped graphane is a conventional superconductor
with a critical temperature (Tc) above the boiling point of liquid nitrogen. The unique strength of
the chemical bonds between carbon atoms and the large density of electronic states at the Fermi
energy arising from the reduced dimensionality synergetically push Tc above 90K, and give rise
to large Kohn anomalies in the optical phonon dispersions. As evidence of graphane was recently
reported, and doping of related materials such as graphene, diamond and carbon nanostructures is
well established, superconducting graphane may be feasible.