paper

Zero temperature metal-insulator transition in the infinite-dimensional Hubbard model

arXiv:cond-mat/9902290 · doi:10.1103/PhysRevLett.83.136

Abstract

The zero temperature transition from a paramagnetic metal to a paramagnetic insulator is investigated in the Dynamical Mean Field Theory for the Hubbard model. The self-energy of the effective impurity Anderson model (on which the Hubbard model is mapped) is calculated using Wilson's Numerical Renormalization Group method. Results for quasiparticle weight, spectral function and self-energy are discussed for Bethe and hypercubic lattice. In both cases, the metal-insulator transition is found to occur via the vanishing of a quasiparticle resonance which appears to be isolated from the Hubbard bands.

4 pages, 3 eps-figures included

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