Light-matter interaction in antiferromagnets: the exchange-induced magnetic dipole mechanism
We propose a novel mechanism for exchange-induced exciton-magnon absorptions via hopping between two antiferromagnetically coupled sites and a simultaneous magnetic dipole transition to an excited orbital state. The obtained selection rules correspond to ones for magnetic dipole transitions and are...
Gespeichert in:
Hauptverfasser: | , , , , |
---|---|
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | We propose a novel mechanism for exchange-induced exciton-magnon absorptions
via hopping between two antiferromagnetically coupled sites and a simultaneous
magnetic dipole transition to an excited orbital state. The obtained selection
rules correspond to ones for magnetic dipole transitions and are in agreement
with the exciton-magnon transitions observed in the quasi one-dimensional
Heisenberg antiferromagnet KCuF3. The calculated magnon density of states in
combination with a structure dependent factor identifies the observed optical
magnon sideband to originate from transverse magnon modes. |
---|---|
DOI: | 10.48550/arxiv.1109.0295 |