Phase diagram of ferrimagnetic ladders with bond-alternation
Condensed Matter
2009-10-31 v1
Abstract
We study the phase diagram of a 2-leg bond-alternation spin-(1/2, 1) ladder for two different configurations using a quantum renormalization group approach. Although d-dimensional ferrimagnets show gapless behavior, we will explicitly show that the effect of the spin mixing and the bond-alternation can open the possibility for observing an energy gap. We show that the gapless phases of such systems can be equivalent to the 1-dimensional half-integer antiferroamgnets, besides the gapless ferrimagnetic phases. We therefore propose a phase transition between these two gapless phases that can be seen in the parameter space.
Keywords
Cite
@article{arxiv.cond-mat/9910103,
title = {Phase diagram of ferrimagnetic ladders with bond-alternation},
author = {A. Langari and M. Abolfath and M. A. Martin-Delgado},
journal= {arXiv preprint arXiv:cond-mat/9910103},
year = {2009}
}
Comments
5 pages and 3 ps figures, accepted in Phys. Rev. B