One-Electron Singular Branch Lines of the Hubbard Chain
J. M. P. Carmelo, K. Penc, L. M. Martelo, P. D. Sacramento, J. M. B., Lopes dos Santos, R. Claessen, M. Sing, and U. Schwingenschl\"ogl
TL;DR
This paper uses pseudofermion dynamical theory to analyze the spectral-function singular branch lines of the 1D Hubbard model, providing predictions that match experimental photoelectron spectroscopy data for TTF-TCNQ.
Contribution
It introduces a comprehensive analysis of the spectral weight distribution near singular branch lines for all densities and U values in the 1D Hubbard model using pseudofermion theory.
Findings
Quantitative agreement with photoelectron spectroscopy data
Detailed momentum and energy dependence of spectral features
Validation of pseudofermion dynamical theory for 1D systems
Abstract
The momentum and energy dependence of the weight distribution in the vicinity of the one-electron spectral-function singular branch lines of the 1D Hubbard model is studied for all values of the electronic density and on-site repulsion . To achieve this goal we use the recently introduced pseudofermion dynamical theory. Our predictions agree quantitatively for the whole momentum and energy bandwidth with the peak dispersions observed by angle-resolved photoelectron spectroscopy in the quasi-1D organic conductor TTF-TCNQ.
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