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One-electron spectral functions of the attractive Hubbard model at intermediate coupling

M. Yu. Kagan

arXiv:cond-mat/9911337Physica B Condensed MatterJul 1, 200015 citations

Spectral Functions and Pseudogap in a Model of Strongly Correlated Electrons

Peter Prelovšek, A. Ramšak

Springer eBooksJan 1, 20030 citations

Tc and pseudogap in the 2-D attractive Hubbard model

José Jesús Rodríguez-Núñez, Sandra Schafroth, H. Beck +3 more

Physica B Condensed MatterFeb 1, 19952 citations

Pair-fluctuation-induced pseudogap in the normal phase of the two-dimensional attractive Hubbard model at weak coupling

Daniel Rohe, Walter Metzner

One-particle spectral properties in the normal phase of the two-dimensional attractive Hubbard model are investigated in the weak-coupling regime using the non-self-consistent T-matrix approximation. The corresponding equations are evaluated numerically directly on the real-frequency axis. For temperatures sufficiently close to the superconducting transition temperature, a pseudogap in the one-particle spectral function is observed, which can be assigned to the increasing importance of pair fluctuations.One-particle spectral properties in the normal phase of the two-dimensional attractive Hubbard model are investigated in the weak-coupling regime using the non-self-consistent T-matrix approximation. The corresponding equations are evaluated numerically directly on the real-frequency axis. For temperatures sufficiently close to the superconducting transition temperature, a pseudogap in the one-particle spectral function is observed, which can be assigned to the increasing importance of pair fluctuations.

arXiv:cond-mat/0011500Physical review. B, Condensed matterMay 22, 200147 citations

PSEUDOGAP BEHAVIOR IN THE INFINITE DIMENSIONAL ATTRACTIVE HUBBARD MODEL

昌久古賀, Akihisa Koga

Jan 1, 20110 citations

The pseudogap and photoemission spectra in the attractive Hubbard model

P. E. Kornilovitch, Bumsoo Kyung

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 presence of bound states. The spectral function is suppressed at the chemical potential, leading to a pseudogap-like behaviour. At high temperatures and densities the pseudogap diminishes and finally disappears; these findings are similar to the experimental observations for the cuprates.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 presence of bound states. The spectral function is suppressed at the chemical potential, leading to a pseudogap-like behaviour. At high temperatures and densities the pseudogap diminishes and finally disappears; these findings are similar to the experimental observations for the cuprates.

arXiv:cond-mat/9808107Journal of Physics Condensed MatterJan 1, 19990 citations

Pseudogap in the one-electron spectral functions of the attractive Hubbard model

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