Abstract
Inelastic neutron scattering experiments on (Formula presented) single crystals and powder samples are used to study the dynamic coupling of one-dimensional Haldane-gap excitations in the (Formula presented)-chains to local crystal-field transitions, associated with the rare earth ions. Substantial interference between the two types of excitations is observed even in the one-dimensional paramagnetic phase. Despite that, the results provide solid justification for the previously proposed “static staggered field” model for (Formula presented) nickelates. The observed behavior is qualitatively explained by a simple chain-random-phase-approximation model.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 11601-11612 |
| Number of pages | 12 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 61 |
| Issue number | 17 |
| DOIs | |
| State | Published - 2000 |
| Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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