Exact Bond-Located Spin Ground State in the Hubbard Chain with Off-Diagonal Coulomb Interactions
Strongly Correlated Electrons
2009-11-07 v1 Statistical Mechanics
Abstract
We show the existence of an exact ground state in certain parameter regimes of one-dimensional half-filled extended Hubbard model with site-off-diagonal interactions. In this ground state, the bond-located spin correlation exhibits a long-range order. In the case when the spin space is SU(2) symmetric, this ground state degenerates with higher spin states including a fully ferromagnetic state. We also discuss the relation between the exact bond-ordered ground state and the critical bond-spin-density-wave phase.
Keywords
Cite
@article{arxiv.cond-mat/0102497,
title = {Exact Bond-Located Spin Ground State in the Hubbard Chain with Off-Diagonal Coulomb Interactions},
author = {Kazuhito Itoh and Masaaki Nakamura and Norihiro Muramoto},
journal= {arXiv preprint arXiv:cond-mat/0102497},
year = {2009}
}
Comments
4 pages, 4 eps figures