• 文献标题:   Disorder-mediated Kondo effect in graphene
  • 文献类型:   Article
  • 作  者:   MIRANDA VG, DA SILVA LGGVD, LEWENKOPF CH
  • 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:   Univ Fed Fluminense
  • 被引频次:   13
  • DOI:   10.1103/PhysRevB.90.201101
  • 出版年:   2014

▎ 摘  要

We study the emergence of strongly correlated states and Kondo physics in disordered graphene. Diluted short-range disorder gives rise to localized midgap states at the vicinity of the system charge neutrality point. We show that long-range disorder, ubiquitous in graphene, allows for the coupling of these localized states to an effective (disorder averaged) metallic band. The system is described by an Anderson-like model. We use the numerical renormalization group method to study the distributions of Kondo temperatures P(T-K). The results show that disorder can lead to long logarithmic tails in P(T-K), consistent with a quantum Griffiths phase.