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Strong-Coupling Expansion for the Hubbard Model | | Stéphane Pairault
; David Sénéchal
; A.-M. S. Tremblay
; | | Date: |
23 Oct 1997 | | Journal: | Phys. Rev. Lett. 80, 5389 (1998) | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Affiliation: | CRPS,Sherbrooke | | Abstract: | A strong-coupling expansion for models of correlated electrons in any dimension is presented. The method is applied to the Hubbard model in $d$ dimensions and compared with numerical results in $d=1$. Third order expansion of the Green function suffices to exhibit both the Mott metal-insulator transition and a low-temperature regime where antiferromagnetic correlations are strong. It is predicted that some of the weak photoemission signals observed in one-dimensional systems such as $SrCuO_2$ should become stronger as temperature increases away from the spin-charge separated state. | | Source: | arXiv, cond-mat/9710256 | | Services: | Forum | Review | PDF | Favorites | |
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