Variational study of Fermi-surface deformations in Hubbard models
classification
❄️ cond-mat.str-el
keywords
hubbardmodelsagreementallowsanalyticalcorrelation-inducedcoulombdeformation
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We study the correlation-induced deformation of Fermi surfaces by means of a new diagrammatic method which allows for the analytical evaluation of Gutzwiller wave functions in finite dimensions. In agreement with renormalization-group results we find Pomeranchuk instabilities in two-dimensional Hubbard models for sufficiently large Coulomb interactions.
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