Honeycomb Hubbard Model at van Hove Filling II: Lower Bounds of the Self-Energy
Abstract
In this paper we complete the proof that the honeycomb Hubbard model with renormalized chemical potential μ=1 is not a Fermi liquid in the mathematically precise sense of Salmhofer, by establishing the necessary lower bounds for second derivatives of the self-energy w.r.t. the external momentum.
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