Gespeichert in:
| Hauptverfasser: | , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2026
|
| Schlagworte: | |
| Online-Zugang: | https://arxiv.org/abs/2604.24951 |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Inhaltsangabe:
- We show that the local crystal-field symmetry of ErBr$_3$ enforces $\langle ψ_\pm | J^{\pm} | ψ_\mp \rangle = 0$ within the ground-state Kramers doublet, thereby removing the lowest-order transverse channel from the low-energy sector. Thermodynamic measurements reveal two zero-field anomalies. Under an in-plane magnetic field, the thermodynamic response separates into a phase boundary and a broader crossover line. Consistently, inelastic neutron scattering measurements above the ordering temperature reveal no well-defined low-energy dispersive magnetic modes. These results show that the crystal-field ground-state symmetry strongly constrains the low-energy dynamics and provides a natural framework for understanding the field-dependent thermodynamic response of ErBr$_3$.