Pseudogap and photoemission spectra in the attractive Hubbard model

Abstract

Angle-resolved photoemission spectra are calculated microscopically for the two-dimensional attractive Hubbard model. A system of self-consistent T-matrix equations are solved numerically in the real-time domain. The single-particle spectral function has a two-peak structure resulting from the presense of bound states. The spectral function is suppressed at the chemical potential, leading to a pseudogap-like behavior. At high temperatures and densities the pseudogap diminishes and finally disappears; these findings are similar to experimental observations for the cuprates.

5 pages, 4 figures, published version

References in corpus (3)

• One-Electron Spectral Functions of the Attractive Hubbard Model for Intermediate Coupling
• Density-Induced Breaking of Pairs in the Attractive Hubbard Model
• A self-consistent, conserving theory of the attractive Hubbard model in two dimensions