Models of impurities in valence bond spin chains and ladders
Strongly Correlated Electrons
2009-10-31 v1
Abstract
We present the class of models of a nonmagnetic impurity in S=1/2 generalized ladder with an AKLT-type valence bond ground state, and of a S=1/2 impurity in the S=1 AKLT chain. The ground state in presence of impurity can be found exactly. Recently studied phenomenon of local enhancement of antiferromagnetic correlations around the impurity is absent for this family of models.
Cite
@article{arxiv.cond-mat/9803364,
title = {Models of impurities in valence bond spin chains and ladders},
author = {Alexei K. Kolezhuk},
journal= {arXiv preprint arXiv:cond-mat/9803364},
year = {2009}
}
Comments
4 pages revtex, 3 figures embedded