Light-matter interaction in antiferromagnets: the exchange-induced magnetic dipole mechanism

Autor:	Eremin, M. V., Fayzullin, M. A., Kant, Ch., Loidl, A., Deisenhofer, J.
Rok vydání:	2011
Předmět:	Condensed Matter - Strongly Correlated Electrons
Druh dokumentu:	Working Paper
Popis:	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. Comment: 4pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1109.0295 Zobrazit plný text záznamu View this record from Arxiv