title: First-principles calculations on the effect of doping and biaxial tensile strain on electron-phonon coupling in graphene.
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 (~4×10(14) cm(-2)) and strain (~16%) levels, the superconducting critical temperature T(c) is estimated to be as high as ~30 K, the highest for a single-element material above the liquid hydrogen temperature.
authors.affiliation: Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, People's Republic of China and Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, USA.
authors.forename: Chen
authors.initials: C
authors.lastname: Si
authors.forename: Zheng
authors.initials: Z
authors.lastname: Liu
authors.forename: Wenhui
authors.initials: W
authors.lastname: Duan
authors.forename: Feng
authors.initials: F
authors.lastname: Liu