Variational study of Fermi surface deformations in Hubbard models
Institut für Physik, BTU Cottbus - D-03013 Cottbus, Germany, EU
2 Fachbereich Physik, Philipps Universität Marburg - D-35032 Marburg, Germany, EU
Accepted: 21 March 2012
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.
PACS: 71.10.Fd – Lattice fermion models (Hubbard model, etc.)
© EPLA, 2012