Theory of Defect-Induced Kondo Effect in Graphene: Numerical Renormalization Group Study

Abstract

An effective model that describes the Kondo effect due to a point defect in graphene is developed, taking account of the electronic state and the lattice structure of the defect. It is shown that this model can be transformed into a single-channel pseudogap Anderson model with a finite chemical potential. On the basis of the numerical renormalization group method, it is clarified that the experimentally observed gate-voltage dependence of the Kondo temperature is understood in this framework.

5 pages, 8 figures

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• Symmetry-protected coherent transport for diluted vacancies and adatoms in graphene
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• Transport signatures of Kondo physics and quantum criticality in graphene with magnetic impurities
• Type-III Dirac Cones from Degenerate Directionally Flat Bands: Viewpoint from Molecular-Orbital Representation
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• Theoretical Analysis on Pseudo-Degenerate Zero-Energy Modes in Vacancy-Centered Hexagonal Armchair Nanographene
• Electrical and thermoelectrical transport in Dirac fermions through a quantum dot
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• Nonequilibrium Kondo effect in a graphene-coupled quantum dot in the presence of a magnetic field
• Density matrix renormalization group study in energy space for a single-impurity Anderson model and an impurity quantum phase transition
• From Kondo to local singlet state in graphene nanoribbons with magnetic impurities
• RKKY interaction in heavily vacant graphene
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• Transport properties for a quantum dot coupled to normal leads with pseudogap
• Defect-Induced Kondo Effect in graphene: Role of Localized State of $\pi$ Electrons
• Theory of Defect-Induced Kondo Effect in Graphene: Effect of Zeeman Field
• Local multiplet formation around a single vacancy in graphene: an effective Anderson model analysis based on the block-Lanczos DMRG method
• Double single-channel Kondo coupling in graphene with Fe molecules