Low-temperature behavior of the large-UHubbard model from high-temperature expansions

1994/07/13 by D. F. B. ten Haaf, Piet W. Brouwer, P. W. Brouwer +2 · 2 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat

paper · pdf · doi:10.1103/physrevb.51.353

published as Phys.Rev.B 51 (1995) 353-367 · LaTeX 2.09, revtex 3.0, 17 pages. 11 PostScript formatted figures available on request. Preprint INLO-PUB-13/94

arxiv created 1994/07/13 · openalex publication_date 1995/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We derive low-temperature properties of the large-U Hubbard model in two and three dimensions starting from exact series-expansion results for high temperatures. Convergence problems and limited available information prevent a direct or Pad'e-type extrapolation. We propose a 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 this formulation an extrapolation down to T=0 can be obtained, but it can be trusted for the presently available series data for \ensuremathβt\ensuremath\lesssim20 and for hole densities n_h\ensuremath\lesssim0.2 only. Implications for the magnetic phase diagram are discussed.

Citations

• Single-Particle Excitations in Magnetic Insulators

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