• 文献标题:   Interactions and phase transitions on graphene's honeycomb lattice
  • 文献类型:   Article
  • 作  者:   HERBUT IF
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW LETTERS
  • ISSN:   0031-9007
  • 通讯作者地址:   Simon Fraser Univ
  • 被引频次:   321
  • DOI:   10.1103/PhysRevLett.97.146401
  • 出版年:   2006

▎ 摘  要

The low-energy theory of interacting electrons on graphene's two-dimensional honeycomb lattice is derived and discussed. In particular, the Hubbard model in the large-N limit is shown to have a semimetal-antiferromagnetic insulator quantum critical point in the universality class of the Gross-Neveu model. The same equivalence is conjectured to hold in the physical case N=2, and its consequences for various physical quantities are examined. The effects of the long-range Coulomb interaction and the magnetic field are discussed.