Spectral Functions of One-dimensional Models of Correlated Electrons
Abstract
Using the Ogata-Shiba wave function, the spectral functions of the one-dimensional infinite U Hubbard model are calculated for various concentrations. It is shown that the ``shadow band'' feature due to 2k_F fluctuations becomes more intense close to half-filling. Comparing these results with exact diagonalization data obtained on finite clusters for the finite U Hubbard model and for the t-J model, it is also shown that this feature remains well-defined for physically reasonable values of the parameters (U/t\simeq 10, J/t\simeq 0.4). The ``shadow'' structure in the spectral functions should thus be observable in angle-resolved photoemission experiments for a variety of quasi-one dimensional compounds.
Cite
@article{arxiv.cond-mat/9611223,
title = {Spectral Functions of One-dimensional Models of Correlated Electrons},
author = {Julien Favand and Stephan Haas and Karlo Penc and Frederic Mila and Elbio Dagotto},
journal= {arXiv preprint arXiv:cond-mat/9611223},
year = {2009}
}
Comments
4 pages, 6 embedded encapsulated PostScript figures, to be published in Phys. Rev. B (RC)