| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-1431 - C8-1432 | |
| DOI | https://doi.org/10.1051/jphyscol:19888656 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1431-C8-1432
DOI: 10.1051/jphyscol:19888656
1 Atomic Energy of Canada Limited, Chalk River Nuclear Laboratories, Chalk River, Ontario, KOJ 1JO, Canada
2 University of Toronto, Toronto, Ontario, M5S 1A1, Canada
3 Laurentian University, Sudbury, Ontario, P3E 2C6, Canada
4 University of Chicago, Chicago, Illinois 60637, U.S.A.
J. Phys. Colloques 49 (1988) C8-1431-C8-1432
DOI: 10.1051/jphyscol:19888656
SYMMETRY OF SPIN WAVES AND HALDANE GAP IN CsNiCl3
Z. Tun1, W. J. L. Buyers1, R. L. Armstrong2, E. D. Hallman3 et D. P. Arovas41 Atomic Energy of Canada Limited, Chalk River Nuclear Laboratories, Chalk River, Ontario, KOJ 1JO, Canada
2 University of Toronto, Toronto, Ontario, M5S 1A1, Canada
3 Laurentian University, Sudbury, Ontario, P3E 2C6, Canada
4 University of Chicago, Chicago, Illinois 60637, U.S.A.
Abstract
Neutron scattering experiments and theoretical calculations on CsNiCl3 show that linear theory fails for the spin wave polarization in the 3-D phase. In the 1-D phase the Haldane mode is observed to be a singlet-to-triplet excitation. We also comment on the wave vector dependence of the dynamic structure factor.