Cumulant calculations of thermodynamic quantities for the Hubbard and the emery model
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Abstract
The calculations of the first paper suggesting phase separation in the Hubbard model [2] are performed under modern computer facilties for the one and three-band Hubbard model. High-temperature approximations for specific heat and static correlation functions are obtained. The latter show, at these high temperatures, no tendency to phase separate in the same way as in the cited paper because our spin parallel nearest-neighbor charge correlation function is negative for all doping values. The spin antiparallel correlation function has positive and negative values for different doping regimes.
Key words
Hubbard model Emery model thermodynamic quantitiesPreview
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References
- 1.J. G. Bednorz and K. A. Müller,Z. Phys. B 64, 189 (1986).Google Scholar
- 2.P. B. Visscher,Phys. Rev. B 10, 933 (1974).Google Scholar
- 3.P. B. Visscher,Phys. Rev. B 10, 943 (1974).Google Scholar
- 4.M. G. Mayer and J. E. Mayer,Statistical Mechanics (Wiley, New York, 1940).Google Scholar
- 5.R. Kubo,J. Phys. Soc. Jpn. 17, 1100 (1962).Google Scholar
- 6.E. Meeron,J. Chem. Phys. 27, 67 (1957).Google Scholar
- 7.V. J. Emery,Phys. Rev. Lett. 58, 2794 (1987).Google Scholar
- 8.C. Cheng and M. H. Huang,J. Appl. Phys. 50, 1761 (1979).Google Scholar
- 9.J. Carstensen and K. Dichtel,Phys. Rev. B 46, 11040 (1992).Google Scholar
- 10.D. F. B. ten Haaf and J. M. J. van Leeuwen,Phys. Rev. B 46, 6313 (1992).Google Scholar
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© Plenum Publishing Corporation 1996