Browsing by Author "Guinea, F."

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    Magnetic moments and Kondo effect near vacancies and resonant scatterers in graphene
    (Amer Physical Soc, 2011)
    Haase, P.
    ;
    Fuchs, Sebastian  
    ;
    Pruschke, T.
    ;
    Ochoa, H.
    ;
    Guinea, F.
    The effect of electronic interactions in graphene with vacancies or resonant scatterers is investigated. We apply dynamical mean-field theory in combination with quantum Monte Carlo simulations, which allow us to treat nonperturbatively quantum fluctuations beyond Hartree-Fock approximations. The interactions narrow the width of the resonance and induce a Curie magnetic susceptibility, signaling the formation of local moments. The absence of saturation of the susceptibility at low temperatures suggests a ferromagnetic Kondo effect.