Superconducting Graphene: the conspiracy of doping and strain
Superconductivity
2013-08-13 v1 Mesoscale and Nanoscale Physics
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 is obvious to enlarge Fermi surface, the effect of strain is profound to greatly increase the electron-phonon coupling. At the experimental accessible doping (4E+14cm-2) and strain (~16%) levels, the superconducting critical temperature Tc reaches as high as ~30 K, the highest for a single-element material above the liquid hydrogen temperature. This significantly makes graphene a commercially viable superconductor.
Keywords
Cite
@article{arxiv.1308.2566,
title = {Superconducting Graphene: the conspiracy of doping and strain},
author = {Chen Si and Zheng Liu and Wenhui Duan and Feng Liu},
journal= {arXiv preprint arXiv:1308.2566},
year = {2013}
}