Low-Temperature Behavior of the Large-U Hubbard Model from High-Temperature Expansions
Abstract
We derive low-temperature properties of the large-U Hubbard model in two and three dimensions from exact series-expansion results for high temperatures. Convergence problems and limited available information prevent a direct or Pade'-type extrapolation. We propose a new method of extrapolation, which is restricted to large U and low hole densities, for which the problem can be mapped on that of a system of weakly interacting holes. In the new formulation an extrapolation down to T=0 can be obtained, but it can be trusted for the presently available series data for kT/t < 0.05 and for hole densities below 0.2 only. Implications for the magnetic phase diagram are discussed.
Keywords
Cite
@article{arxiv.cond-mat/9407061,
title = {Low-Temperature Behavior of the Large-U Hubbard Model from High-Temperature Expansions},
author = {D. F. B. ten Haaf and P. W. Brouwer and P. J. H. Denteneer and J. M. J. van Leeuwen},
journal= {arXiv preprint arXiv:cond-mat/9407061},
year = {2009}
}
Comments
LaTeX 2.09, revtex 3.0, 17 pages. 11 PostScript formatted figures available on request. Preprint INLO-PUB-13/94