Modulating effect of pair-hopping and spin exchange interactions on a half-filled generalized U–V chain

@article{Ding2014ModulatingEO,
title={Modulating effect of pair-hopping and spin exchange interactions on a half-filled generalized U–V chain},
author={H. Ding and J. Zhang},
journal={Modern Physics Letters B},
year={2014},
volume={28},
pages={1450042}
}

In this paper, we study analytically a half-filled generalized Hubbard chain with a quite general nearest-neighbor interaction, parametrized by diagonal repulsion V, off-diagonal pair-hopping and correlated-hopping repulsions W, X and antiferromagnetic spin exchange J for small values of the interactions. The ground state phase diagram is obtained in the weak-coupling regime. Besides the charge-density-wave (CDW) and spin-density-wave (SDW) phases for large 2V/U and U/2V, respectively, we… CONTINUE READING