Dynamics of composite haldane spin chains in IPA-CuCl3

T. Masuda, A. Zheludev, H. Manaka, L. P. Regnault, J. H. Chung, Y. Qiu

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109 Citations (Scopus)


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.

Original languageEnglish
Article number047210
JournalPhysical review letters
Issue number4
Publication statusPublished - 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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