Dynamics of composite haldane spin chains in IPA-CuCl3 -: art. no. 047210

被引：115

作者：

Masuda, T ^{[1
]}

Zheludev, A

Manaka, H

Regnault, LP

Chung, JH

Qiu, Y

机构：

[1] Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA

[2] Kagoshima Univ, Grad Sch Sci & Engn, Kagoshima 8900065, Japan

[3] CEA Grenoble, DRFMC, SPSMS, MDN, F-38054 Grenoble 9, France

[4] Natl Inst Stand & Technol, NCNR, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.96.047210

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

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

页数：4

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