Dynamics of composite Haldane spin chains in IPA-CuCl3
强关联电子
2009-11-11 v1 材料科学
摘要
Magnetic excitations in the quasi-one-dimensional antiferromagnet IPA-CuCl3 are studied by cold neutron inelastic scattering. Strongly dispersive gap excitations are observed. Contrary to previously proposed models, the system is best described as an asymmetric quantum spin ladder. The observed spectrum is interpreted in terms of ``composite'' Haldane spin chains. The key difference from actual S=1 chains is a sharp cutoff of the single-magnon spectrum at a certain critical wave vector.
引用
@article{arxiv.cond-mat/0511143,
title = {Dynamics of composite Haldane spin chains in IPA-CuCl3},
author = {T. Masuda and A. Zheludev and H. Manaka and L. -P. Regnault and J. -H. Chung and Y. Qiu},
journal= {arXiv preprint arXiv:cond-mat/0511143},
year = {2009}
}
备注
4 pages 4 figures