Volume 67, Number 2, July 2004
|Page(s)||233 - 239|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 July 2004|
One-electron singular branch lines of the Hubbard chain
GCEP-Center of Physics, U. Minho, Campus Gualtar - P-4710-057 Braga, Portugal
2 Research Institute for Solid State Physics and Optics H-1525 Budapest, P.O.B. 49, Hungary
3 Physics Department, Engineering Faculty of U. Porto - P-4200-465 Porto, Portugal
4 CFIF, Instituto Superior Técnico - Av. Rovisco Pais, 1049-001 Lisboa, Portugal
5 CFP and Departamento de Física FC U. Porto - P-4169-007 Porto, Portugal
6 Experimentalphysik II, Universität Augsburg - D-86135 Augsburg, Germany
Corresponding author: email@example.com
Accepted: 7 May 2004
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 U. 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.
PACS: 71.10.Pm – Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.) / 71.27.+a – Strongly correlated electron systems; heavy fermions
© EDP Sciences, 2004
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