• 文献标题:   Vortex core states in superconducting graphene
  • 文献类型:   Article
  • 作  者:   KHAYMOVICH IM, KOPNIN NB, MEL NIKOV AS, SHERESHEVSKII IA
  • 作者关键词:   doping profile, fermi level, graphene, mixed state, superconducting material
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121
  • 通讯作者地址:   Russian Acad Sci
  • 被引频次:   15
  • DOI:   10.1103/PhysRevB.79.224506
  • 出版年:   2009

▎ 摘  要

The electronic structure of vortex states in superconducting graphene is studied within the Bogoliubov-de Gennes theory applied to excitations near the Dirac point. We consider the subgap spectrum transformations which occur with a change in the doping level. For an arbitrary vorticity and doping level we investigate the problem of existence of zero-energy modes. The crossover to a Caroli-de Gennes-Matricon type of spectrum is studied. Results of numerical computations are reported that illustrate the behavior of the spectrum with a change in the doping level.