Kondo effect in graphene with Rashba spin-orbit coupling

Abstract

We study the Kondo screening of a magnetic impurity adsorbed in graphene in the presence of Rashba spin-orbit interaction. The system is described by an effective single-channel Anderson impurity model, which we analyze using the numerical renormalization group. The nontrivial energy dependence of the host density of states gives rise to interesting behaviors under variation of the chemical potential or the spin-orbit coupling. Varying the Rashba coupling produces strong changes in the Kondo temperature characterizing the many-body screening of the impurity spin, and at half filling allows approach to a quantum phase transition separating the strong-coupling Kondo phase from a free-moment phase. Tuning the chemical potential close to sharp features of the hybridization function results in striking features in the temperature dependences of thermodynamic quantities and in the frequency dependence of the impurity spectral function.

11 pages, 9 figures. Minor changes. Accepted in PRB

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Cited by in corpus (5)

• Kondo effect and non-Fermi liquid behavior in Dirac and Weyl semimetals
• Kondo effect in a quantum wire with spin-orbit coupling
• Spatial structure of correlations around a quantum impurity at the edge of a two-dimensional topological insulator
• Ferromagnetic induced Kondo effect in graphene with a magnetic impurity
• Zero-field splitting of the Kondo resonance and quantum criticality in triple quantum dots