Year: 2014
Type: article
Abstract: 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.
Source: Physical Review B
Institutions: Universidade Federal Fluminense, Universidade de São Paulo
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2095153990