Magnetization plateaux in dimerized spin ladder arrays
Condensed Matter
2009-10-31 v2
Abstract
We investigate the ground state magnetization plateaux appearing in spin 1/2 two-leg ladders built up from dimerized antiferromagnetic Heisenberg chains and dimerized zig-zag interchain couplings. Using both Abelian bosonization and Lanczos methods we find that the system yields rather unusual plateaux and exhibits massive and massless phases for specific choices or ``tuning'' of exchange interactions. The relevance of this behavior in the study of NH_4CuCl_3 is discussed.
Cite
@article{arxiv.cond-mat/9911387,
title = {Magnetization plateaux in dimerized spin ladder arrays},
author = {D. C. Cabra and M. D. Grynberg},
journal= {arXiv preprint arXiv:cond-mat/9911387},
year = {2009}
}
Comments
9 pages, RevTeX, 11 postscript figures