• 文献标题:   Kohn-Luttinger superconductivity in graphene
  • 文献类型:   Article
  • 作  者:   GONZALEZ J
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121
  • 通讯作者地址:   CSIC
  • 被引频次:   98
  • DOI:   10.1103/PhysRevB.78.205431
  • 出版年:   2008

▎ 摘  要

We investigate the development of superconductivity in graphene when the Fermi level becomes close to one of the Van Hove singularities of the electron system. The origin of the pairing instability lies in the strong anisotropy of the e-e scattering at the Van Hove filling, which leads to a channel with attractive coupling when making the projection of the BCS vertex on the symmetry modes with nontrivial angular dependence along the Fermi line. We show that the scale of the superconducting instability may be pushed up to temperatures larger than 10 K, depending on the ability to tune the system to the proximity of the Van Hove singularity.