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Pseudogap and photoemission spectra in the attractive Hubbard model

P. E. Kornilovitch·Bumsoo Kyung
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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.

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P. E. Kornilovitch, Bumsoo Kyung. 1999-02-17. Pseudogap and photoemission spectra in the attractive Hubbard model. https://doi.org/10.1088/0953-8984%2F11%2F3%2F013

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