Disorder-mediated Kondo effect in graphene

Article

关键词: NUMERICAL RENORMALIZATION-GROUP;    GAPLESS FERMI SYSTEMS;    MAGNETIC-IMPURITIES;    GRIFFITHS PHASE;    LIQUID BEHAVIOR;    ANDERSON MODEL;    DEFECTS;    ALLOYS;    STATES;   

DOI  :  10.1103/PhysRevB.90.201101

来源: SCIE

【 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.

【 授权许可】

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