Modulation structure of a frustrated spin ladder
Strongly Correlated Electrons
2009-10-31 v1
Abstract
We study a two-leg spin-1/2 ladder with isotropic exchanges and biquadratic interactions in the basic plaquettes. It is shown that for the extremely frustrated case, the system exhibits a self-organized phase separation. In some parameter regions, the singlet rungs form a Wigner-like lattice in the triplet-rung host. There are three types of elementary excitations in this modulation phase, i.e., the spinons in a triplet domain, the broken singlet rungs and the deformation of the Wigner-like lattice. The flux phase induced by an external magnetic field in the rung-dimerized phase is also discussed.
Cite
@article{arxiv.cond-mat/9911049,
title = {Modulation structure of a frustrated spin ladder},
author = {Yupeng Wang},
journal= {arXiv preprint arXiv:cond-mat/9911049},
year = {2009}
}
Comments
7 pages Revtex, no figure, to appear in Int. J. Mod. Phys. 28