High-energy spin waves in the spin-1 square-lattice antiferromagnet La_{2}NiO_{4}
Inelastic neutron scattering is used to study the magnetic excitations of the S=1 square-lattice antiferromagnet La_{2}NiO_{4}. We find that the spin waves cannot be described by a simple classical (harmonic) Heisenberg model with only nearest-neighbor interactions. The spin-wave dispersion measured...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2023-08-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.5.033113 |