Correlation-induced metal insulator transition in a two-channel fermion-boson model

Abstract

We investigate charge transport within some background medium by means of an effective lattice model with a novel form of fermion-boson coupling. The bosons describe fluctuations of a correlated background. By analyzing groundstate and spectral properties of this transport model, we show how a metal-insulator quantum phase transition can occur for the half-filled band case. We discuss the evolution of a mass-asymmetric band structure in the insulating phase and establish connections to the Mott and Peierls transition scenarios.

4 pages, 4 figures, 1 table, revised version accepted for publication in Phys. Rev. Lett

References in corpus (5)

• The Kernel Polynomial Method
• Quantum lattice dynamical effects on the single-particle excitations in 1D Mott and Peierls insulators
• Boson-controlled quantum transport
• Fluctuating Cu-O-Cu Bond model of high temperature superconductivity in cuprates
• Competitive density waves in quasi-one-dimensional electron systems

Cited by in corpus (1)

• Quantum phase transition in a 1D transport model with boson affected hopping: Luttinger liquid versus charge-density-wave behavior