Magnetic adatoms on graphene in the Kondo regime: an Anderson model treatment

Abstract

We study theoretically the Kondo effect for a magnetic adatom on graphene using the Anderson model.Upon obtaining the Green's function of the impurity to higher order contributions in the hybridization, we calculated analytically the selfenergy in the presence of strong correlations.It is found that the Kondo resonance takes place in a narrow energy range of the impurity level around the Fermi energy which can be tuned by a gate voltage.We show that this range is linear in the Fermi energy $|\mu |$ and is significantly narrower than in the case for a normal metal.The origin of this behavior is traced back to the inherent properties of graphene, especially its linear dispersion.The singularity in the full Green's function is also analyzed with the help of a transparent geometrical method.The relations between the various selfenergies and the implications for the experimental observations are discussed .

9 pages, 5 figures, accepted for publication in Phys. Rev. B

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Cited by in corpus (9)

• The Physics of Kondo Impurities in Graphene
• Kondo effect in monolayer and bilayer graphene: physical realizations of the multi-channel Kondo models
• Kondo effect of an adatom in graphene and its scanning tunneling spectroscopy
• Nonequilibrium Kondo effect in a graphene-coupled quantum dot in the presence of a magnetic field
• Reentrant Kondo effect in a quantum impurity coupled to a metal-semiconductor hybrid contact
• From Kondo to local singlet state in graphene nanoribbons with magnetic impurities
• Electrically tunable Kondo effect as a direct measurement of the chiral anomaly in disorder Weyl semimetals
• The graphene sheet versus the 2DEG: a relativistic Fano spin-filter via STM and AFM tips
• Effect of Inter-Adatoms Correlations on the Local Density of States of Graphene