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TT: Fachverband Tiefe Temperaturen
TT 19: CE: Quantum Impurities, Kondo Physics
TT 19.1: Vortrag
Montag, 14. März 2011, 18:45–19:00, HSZ 304
Phase transitions in the multichannel Anderson model with pseudogap density of states — •Imke Schneider1, Adel Benlagra1, Lars Fritz2, and Matthias Vojta1 — 1Institut für Theoretische Physik, TU Dresden — 2Institut für Theoretische Physik, Universität zu Köln
We consider a multichannel Anderson model with a pseudogap density of states ρ(ω)∝ |ω|r. Using analytical and numerical renormalization group techniques we study the phase diagram and associated observables. In particular, we apply an expansion in the hybridization strength to access the quantum phase transition near r=1. We relate our findings to experimental results on graphene.