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Two Generalizations of $eta$ Pairing in Extended Hubbard Models | | Hui Zhai
; | | Date: |
21 Jun 2004 | | Journal: | Physical Review B, 71, 012512 (2005) | | Subject: | Superconductivity; Statistical Mechanics | cond-mat.supr-con cond-mat.stat-mech | | Abstract: | A rigorous result about Hubbard model obtained by C.N.Yang [Phys.Rev.Lett.63,2144(1989)] is generalized to two kinds of extended Hubbard models. One is the Hubbard model in two-dimensional triangular lattice, and the other is the Hubbard model for high spins fermions. We obtain the conditions under which a modified $eta$-pairing operator is an eigen-operator, thus these models have a series of eigenstates possessing off-diagonal long-range order. | | Source: | arXiv, cond-mat/0406461 | | Services: | Forum | Review | PDF | Favorites | |
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