Two Generalizations of $\eta$ Pairing in Extended Hubbard Models
Superconductivity
2009-11-10 v2 Statistical Mechanics
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 -pairing operator is an eigen-operator, thus these models have a series of eigenstates possessing off-diagonal long-range order.
Keywords
Cite
@article{arxiv.cond-mat/0406461,
title = {Two Generalizations of $\eta$ Pairing in Extended Hubbard Models},
author = {Hui Zhai},
journal= {arXiv preprint arXiv:cond-mat/0406461},
year = {2009}
}
Comments
4 Pages, 1 figure