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  • Bartkowiak, M., et al. (author)
  • High-Density Expansion for the Spinless Fermion Model I : First Order in 1/z and Horwitz-Callen Renormalization
  • 1988
  • In: International Journal of Modern Physics B. - : World Scientific Publishing. - 0217-9792. ; 2:03-04, s. 483-520
  • Journal article (peer-reviewed)abstract
    • A diagrammatic technique for Hubbard's operators is employed to perform systematically the high-density expansion for the three-dimensional spinless fermion model. The molecular field theory is obtained by the zero-order renormalization of blocks. Summation of the first order diagrams is carried out in both selfconsistent and correctional way. It turns out that the charge ordering parameter, calculated self-consistently, has a jump for a certain medial temperature. We have also shown, that the Horwitz-Callen renormalization leads to the first or second order phase transition, depending on t/W and fails when this ratio is large enough. The phase diagrams of the system for the half-filled band case, derived in both unrenormalized and renormalized first order of high-density expansion are presented.
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  • Result 1-2 of 2
Type of publication
conference paper (1)
journal article (1)
Type of content
peer-reviewed (2)
Author/Editor
Münger, Peter (2)
BARTKOWIAK, M (2)
MICNAS, R (2)
CHAO, KA (1)
University
Linköping University (2)
Language
English (2)

Year

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