Absence of overscreened Kondo effect in ferromagnetic host
Strongly Correlated Electrons
2009-10-31 v1
Abstract
We study the low temperature behavior of a boundary magnetic impurity S'=1/2 in an open ferromagnetic Takhatajian-Babujian spin-S chain. For antiferromagnetic Kondo coupling, it is show via Bethe ansatz solution that the impurity spin is always locked into the critical behavior the bulk. At low temperature, a local composite of spin S-1/2 forms near the impurity site and its contribution to specific heat is of simple power law T^{1/2}. The absence of overscreened Kondo effect is due to the large correlation length of host spins which is divergent near the quantum critical point.
Cite
@article{arxiv.cond-mat/0006058,
title = {Absence of overscreened Kondo effect in ferromagnetic host},
author = {Jianhui Dai and Yupeng Wang},
journal= {arXiv preprint arXiv:cond-mat/0006058},
year = {2009}
}
Comments
4 pages. to appear in Phys. Rev. B1(R4A)(2000)