Disorder-mediated Kondo effect in graphene

被引：20

作者：

Miranda, V. G. ^{[1
]}

Dias da Silva, Luis G. G. V. ^{[2
]}

Lewenkopf, C. H. ^{[1
]}

机构：

[1] Univ Fed Fluminense, Inst Fis, BR-24210346 Niteroi, RJ, Brazil

[2] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 20期

基金：

巴西圣保罗研究基金会;

关键词：

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

D O I：

10.1103/PhysRevB.90.201101

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页数：5

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