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Flat-band ferromagnetism induced by off-site repulsions | | Ryotaro Arita
; Yukihiro Shimoi
; Kazuhiko Kuroki
; Hideo Aoki
; | | Date: |
23 Dec 1997 | | Subject: | cond-mat | | Abstract: | Density matrix renormalization group method is used to analyze how the nearest-neighbor repulsion V added to the Hubbard model on 1D triangular lattice and a railway trestle (t-t’) model will affect the electron-correlation dominated ferromagnetism arising from the interference (frustration). Obtained phase diagram shows that there is a region in smaller-t’ side where the critical on-site repulsion above which the system becomes ferromagnetic is reduced when the off-site repulsion is introduced. | | Source: | arXiv, cond-mat/9801242 | | Services: | Forum | Review | PDF | Favorites | |
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