Spectral microscopic mechanisms and quantum phase transitions in a 1D correlated problem

Abstract

In this paper we study the dominant microscopic processes that generate nearly the whole one-electron removal and addition spectral weight of the one-dimensional Hubbard model for all values of the on-site repulsion $U$. We find that for the doped Mott-Hubbard insulator there is a competition between the microscopic processes that generate the one-electron upper-Hubbard band spectral-weight distributions of the Mott-Hubbard insulating phase and finite-doping-concentration metallic phase, respectively. The spectral-weight distributions generated by the non-perturbative processes studied here are shown elsewhere to agree quantitatively for the whole momentum and energy bandwidth with the peak dispersions observed by angle-resolved photoelectron spectroscopy in quasi-one-dimensional compounds.

18 pages, 2 figures

References in corpus (2)

• Finite-Energy Spectral-Weight Distributions of a 1D Correlated Metal
• Scattering mechanisms and spectral properties of the one-dimensional Hubbard model

Cited by in corpus (4)

• Charge dynamics in half-filled Hubbard chains with finite on-site interaction
• One-electron singular spectral features of the 1D Hubbard model at finite magnetic field
• Finite energy spectral function of an anisotropic 2D system of coupled Hubbard chains
• The TTF finite-energy spectral features in photoemission of TTF-TCNQ: The Hubbard-chain description