Propagating S=1/2 particles in S=1 Haldane gap systems
Condensed Matter
2016-08-31 v2
Abstract
Inspired by the recent experiments on YCaBaNiO, (J. F. DiTusa {\it et al.}, Phys. Rev. Lett. 73, 1857 (1994)), we discuss the dispersion relation of the =1/2 particles in the =1 Heisenberg and VBS model in the limit of small hopping amplitudes. The effective =1/2 edge spins mix with the spin of the impurity resulting in one four--fold and two two--fold degenarate bands. We briefly discuss the interaction between the =1/2 particles arising from the background.
Keywords
Cite
@article{arxiv.cond-mat/9502085,
title = {Propagating S=1/2 particles in S=1 Haldane gap systems},
author = {Karlo Penc and Hiroyuki Shiba},
journal= {arXiv preprint arXiv:cond-mat/9502085},
year = {2016}
}
Comments
4 pages, RevTeX 3.0, 4 figures available on request