• 文献标题:   Topological Insulator in the Core of the Superconducting Vortex in Graphene
  • 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:   42
  • DOI:   10.1103/PhysRevLett.104.066404
  • 出版年:   2010

▎ 摘  要

The core of the vortex in a general superconducting order parameter in graphene is argued to be ordered, with the possible local order parameters forming the algebra U(1) x Cl(3). A sufficiently strong Zeeman coupling of the magnetic field of the vortex to the electron spin breaks the degeneracy in the core in favor of the anomalous quantum Hall state. I consider a variety of superconducting condensates on the honeycomb lattice and demonstrate the surprising universality of this result. A way to experimentally determine the outcome of the possible competition between different types of orders in the core is proposed.