Light-matter interaction in antiferromagnets: the exchange-induced magnetic dipole mechanism
Strongly Correlated Electrons
2011-09-06 v2
Abstract
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.
Keywords
Cite
@article{arxiv.1109.0295,
title = {Light-matter interaction in antiferromagnets: the exchange-induced magnetic dipole mechanism},
author = {M. V. Eremin and M. A. Fayzullin and Ch. Kant and A. Loidl and J. Deisenhofer},
journal= {arXiv preprint arXiv:1109.0295},
year = {2011}
}
Comments
4pages, 3 figures