Dynamics of composite haldane spin chains in IPA-CuCl3

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 spec...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2006-02, Vol.96 (4), p.047210-047210
Main Authors: Masuda, T, Zheludev, A, Manaka, H, Regnault, L-P, Chung, J-H, Qiu, Y
Format: Article
Language:English
Subjects:
ANTIFERROMAGNETIC MATERIALS
COLD NEUTRONS
EXCITATION
INELASTIC SCATTERING
NEUTRON DIFFRACTION
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
SPIN
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.96.047210