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ELECTRON CORRELATION EFFECT IN THE HUBBARD-HIRSCH MODEL

WEI GUO-ZHU

ELECTRON CORRELATION EFFECT IN THE HUBBARD-HIRSCH MODEL

WEI GUO-ZHU
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  • Received Date:  22 November 1993
  • Published Online:  20 November 1994

ELECTRON CORRELATION EFFECT IN THE HUBBARD-HIRSCH MODEL

  • 1. 东北大学物理系

Abstract: Based on the single-site electron correlation, the local approach has been used to investigate the ferromagnetic phase in the Hubbard-Hirsch model. Using the R =0,α approximation in second-order calculation, the electron Correlation effect on the phase diagram has been studied Carefully. Comparing with those of the R=0 approximation, the electron correlation effect becomes weaker due to taking into aceount the nondiagonal elements of density matrix.

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