Abstract
Graphene has exhibited a wealth of fascinating properties, but is also known not to be a superconductor. Remarkably, we show that graphene can be made a conventional Bardeen-Cooper-Schrieffer superconductor by the combined effect of charge doping and tensile strain. While the effect of doping obviously enlarges the Fermi surface, the effect of strain profoundly increases the electron-phonon coupling. At the experimental accessible doping () and strain () levels, the superconducting critical temperature is estimated to be as high as , the highest for a single-element material above the liquid hydrogen temperature.
- Received 13 June 2013
DOI:https://doi.org/10.1103/PhysRevLett.111.196802
© 2013 American Physical Society