New results on the excitations of an S = 1 quantum chain
Journal of Magnetism and Magnetic Materials 226-230:PART I (2001) 437-438
Abstract:
Neutron scattering measurements have been made of the excitations of the S = 1 antiferromagnetic chain compound CSNiCl3. The new results show the existence of a continuum component to the excitation spectrum at energies higher than the Haldane gap and that the Haldane gap excitation increases in energy and remains resonant as the temperature is increased. 漏 2001 Elsevier Science B.V. All rights reserved.Magnetic order and spin-waves in the quasi-1D S=1/2 antiferromagnet ${\bf BaCu_{2}Si_{2}O_{7}}$
(2000)
Magnetic order and spin-waves in the quasi-1D S=1/2 antiferromagnet ${\bf BaCu_{2}Si_{2}O_{7}}$
ArXiv cond-mat/0012452 (2000)
Abstract:
Elastic and inelastic neutron scattering were used to study the ordered phase of the quasi-one-dimensional spin-1/2 antiferromagnet ${\rm BaCu_{2}Si_{2}O_{7}}$. The previously proposed model for the low-temperature magnetic structure was confirmed. Spin wave dispersion along several reciprocal-space directions was measured and inter-chain, as well as in-chain exchange constants were determined. A small gap in the spin wave spectrum was observed and attributed to magnetic anisotropy effects. The results are discussed in comparison with existing theories for weakly-coupled quantum spin chain antiferromagnets.ChemInform Abstract: Onset of Antiferromagnetism in Heavy鈥怓ermion Metals
ChemInform Wiley 31:50 (2000) no-no
Multi-particle States in Spin-1 Chain System CsNiCl3
(2000)