Metal-insulator transition in the Edwards model

Abstract

To understand how charge transport is affected by a background medium and vice versa we study a two-channel transport model which captures this interplay via a novel, effective fermion-boson coupling. By means of (dynamical) DMRG we prove that this model exhibits a metal-insulator transition at half-filling, where the metal typifies a repulsive Luttinger liquid and the insulator constitutes a charge density wave. The quantum phase transition point is determined consistently from the calculated photoemission spectra, the scaling of the Luttinger liquid exponent, the charge excitation gap, and the entanglement entropy.

4 pages, 3 figures, contributions to SCES 2011

References in corpus (5)

• Tomonaga-Luttinger parameters for doped Mott insulators
• Tomonaga-Luttinger-liquid criticality: numerical entanglement entropy approach
• Boson-controlled quantum transport
• Quantum phase transition in a 1D transport model with boson affected hopping: Luttinger liquid versus charge-density-wave behavior
• Correlation-induced metal insulator transition in a two-channel fermion-boson model

Cited by in corpus (1)

• Charge-density-wave formation in the Edwards fermion-boson model at one-third band filling