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 = π, 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 nonlinear sigma model for the three-particle continuum.
Original language | English |
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Journal | Physical Review Letters |
Volume | 87 |
Issue number | 1 |
DOIs | |
State | Published - 2001 |
Externally published | Yes |