Physics – Condensed Matter
Scientific paper
1994-07-13
Phys.Rev.B 51 (1995) 353-367
Physics
Condensed Matter
LaTeX 2.09, revtex 3.0, 17 pages. 11 PostScript formatted figures available on request. Preprint INLO-PUB-13/94
Scientific paper
10.1103/PhysRevB.51.353
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.
Brouwer Piet. W.
Denteneer Peter J. H.
ten Haaf F. B. D.
van Leeuwen M. J. J.
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