Combined analytical and numerical approach to study magnetization plateaux in doped quasi-one-dimensional antiferromagnets
Abstract
We investigate the magnetic properties of quasi-one-dimensional quantum spin-S antiferromagnets. We use a combination of analytical and numerical techniques to study the presence of plateaux in the magnetization curve. The analytical technique consists in a path integral formulation in terms of coherent states. This technique can be extended to the presence of doping and has the advantage of a much better control for large spins than the usual bosonization technique. We discuss the appearance of doping-dependent plateaux in the magnetization curves for spin-S chains and ladders. The analytical results are complemented by a density matrix renormalization group (DMRG) study for a trimerized spin-1/2 and anisotropic spin-3/2 doped chains.
Keywords
Cite
@article{arxiv.1105.3527,
title = {Combined analytical and numerical approach to study magnetization plateaux in doped quasi-one-dimensional antiferromagnets},
author = {C. A. Lamas and S. Capponi and P. Pujol},
journal= {arXiv preprint arXiv:1105.3527},
year = {2011}
}
Comments
12 pages, 5 figures