Multi-particle States in Spin-1 Chain System CsNiCl3

Abstract

A continuum of magnetic states has been observed by neutron scattering from the spin-1 chain compound CsNiCl3 in its disordered gapped one-dimensional phase. Results using both triple-axis and time-of-flight spectrometers show that around the antiferromagnetic point Qc=pi, the continuum lies higher in energy than the Haldane gapped excitations. At 6K the integrated intensity of the continuum is about 12(2)% of the total spectral weight. This result is considerably larger than the 1-3% weight predicted by the non-linear sigma model for the 3-particle continuum.

Latex, 3 figures, submitted to PRL

References in corpus (4)

• Spin dynamics and transport in gapped one-dimensional Heisenberg antiferromagnets at nonzero temperatures
• On the 3-particle scattering continuum in quasi one dimensional integer spin Heisenberg magnets
• Temperature Evolution of the Quantum Gap in CsNiCl3
• The Three-Magnon Contribution to the Spin Correlation Function in Integer-Spin Antiferromagnetic Chains

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