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

R. Bulla
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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.

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R. Bulla. 1999-02-21. Zero temperature metal-insulator transition in the infinite-dimensional Hubbard model. https://doi.org/10.1103/physrevlett.83.136

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