• 文献标题:   Phonon-induced superconductivity at high temperatures in electrical graphene superlattices
  • 文献类型:   Article
  • 作  者:   DIETEL J, BEZERRA VHF, KLEINERT H
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:   Free Univ Berlin
  • 被引频次:   4
  • DOI:   10.1103/PhysRevB.89.195435
  • 出版年:   2014

▎ 摘  要

We discuss the BCS theory for electrons in graphene with a superimposed electrical unidirectional superlattice (SL) potential. New Dirac points emerge together with van Hove singularities (VHSs) linking them. We obtain a superconducting transition temperature T-c for chemical potentials close to the VHSs assuming that acoustic phonon coupling should be the dominant mechanism. Pairing of two onsite electrons with one electron close to the K and the other close to the -K point is the most stable pair formation. The resulting order parameter is almost constant over the entire SL.