Effect of Particle-Hole Asymmetry on the Mott-Hubbard Metal-Insulator Transition

Abstract

The Mott-Hubbard metal-insulator transition is one of the most important problems in correlated electron systems. In the past decade, much progress has been made on examining a particle-hole symmetric form of the transition in the Hubbard model with dynamical mean field theory where it was found that the electronic self energy develops a pole at the transition. We examine the particle-hole asymmetric metal-insulator transition in the Falicov-Kimball model, and find that a number of features change when the noninteracting density of states has a finite bandwidth. Since, generically particle-hole symmetry is broken in real materials, our results have an impact on understanding the metal-insulator transition in real materials.

arXiv comment5 pages, 3 figures

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• Metal--Insulator Transitions in the Falicov--Kimball Model with Disorder
• Perfect dc conductance of a finite width Mott insulator sandwiched between metallic leads at zero temperature: a quantum emergent phenomenon in strongly correlated multilayers
• Electronic Raman scattering in correlated materials: exact treatment of nonresonant, mixed, and resonant scattering with dynamical mean field theory
• Dynamical mean-field theory for light fermion--heavy boson mixtures on optical lattices
• Electronic charge reconstruction of doped Mott insulators in multilayered nanostructures
• Band-Mott mixing hybridizes the gap in Fe${}_2$Mo${}_3$O${}_8$
• Reentrant Kondo effect in a quantum impurity coupled to a metal-semiconductor hybrid contact
• From Kondo to local singlet state in graphene nanoribbons with magnetic impurities
• Metal-insulator transition in half-filling two-orbital Hubbard model on triangular lattice
• Evidences for interaction-induced Haldane fractional exclusion statistics in one and higher dimensions
• Suppression of the Mott insulating phase in the particle-hole asymmetric Hubbard model