Phase transitions in the multichannel Anderson model with pseudogap density of states

Imke Schneider

Technische Universität Dresden, Institut für Theoretische Physik, Dresden, Germany

Imke Schneider1, Adel Benlagra1, Lars Fritz2, and Matthias Vojta1 1) Institut für Theoretische Physik, Technische Universität Dresden 2) Institut 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.

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