ELECTRON CORRELATION EFFECT IN THE HUBBARD-HIRSCH MODEL | Zendy

Guozhu Wei | Zendy

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ELECTRON CORRELATION EFFECT IN THE HUBBARD-HIRSCH MODEL

Author(s) -

Guozhu Wei

Publication year - 1994

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.43.1828

Subject(s) - hubbard model , electronic correlation , physics , condensed matter physics , ferromagnetism , correlation , phase diagram , strongly correlated material , electron , order (exchange) , phase (matter) , quantum mechanics , statistical physics , mathematics , superconductivity , finance , economics , geometry

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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