title: Magneto- to electroactive transmutation of spin waves in ErMnO3.
abstract: The low-energy dynamical properties of the multiferroic hexagonal perovskite ErMnO3 have been studied by inelastic neutron scattering as well as terahertz and far infrared spectroscopies on a synchrotron source. From these complementary techniques, we have determined the magnon and crystal field spectra and identified a zone center magnon excitable only by the electric field of an electromagnetic wave. Using a comparison with the isostructural YMnO3 compound and crystal field calculations, we propose that this dynamical magnetoelectric process is due to the hybridization of a magnon with an electroactive crystal field transition.
authors.affiliation: Institut Laue-Langevin, 6 rue Jules Horowitz, 38042 Grenoble, France and Université Grenoble Alpes, Institut Néel, 38042 Grenoble, France and CNRS, Institut Néel, 38042 Grenoble, France.
authors.forename: L
authors.initials: L
authors.lastname: Chaix
authors.affiliation: Université Grenoble Alpes, Institut Néel, 38042 Grenoble, France and CNRS, Institut Néel, 38042 Grenoble, France.
authors.forename: S
authors.initials: S
authors.lastname: de Brion
authors.affiliation: CEA, Centre de Saclay, DSM/IRAMIS/Laboratoire Léon Brillouin, 91191 Gif-sur-Yvette, France.
authors.forename: S
authors.initials: S
authors.lastname: Petit
authors.affiliation: Université Grenoble Alpes, Institut Néel, 38042 Grenoble, France and CNRS, Institut Néel, 38042 Grenoble, France.
authors.forename: R
authors.initials: R
authors.lastname: Ballou
authors.affiliation: SPSMS-MDN, UMR-E CEA/UJF-Grenoble, INAC, 38054 Grenoble, France.
authors.forename: L-P
authors.initials: LP
authors.lastname: Regnault
authors.affiliation: Institut Laue-Langevin, 6 rue Jules Horowitz, 38042 Grenoble, France.
authors.forename: J
authors.initials: J
authors.lastname: Ollivier
authors.affiliation: Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin, 91192 Gif-sur-Yvette, France.
authors.forename: J-B
authors.initials: JB
authors.lastname: Brubach
authors.affiliation: Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin, 91192 Gif-sur-Yvette, France.
authors.forename: P
authors.initials: P
authors.lastname: Roy
authors.affiliation: Université Grenoble Alpes, Institut Néel, 38042 Grenoble, France and CNRS, Institut Néel, 38042 Grenoble, France.
authors.forename: J
authors.initials: J
authors.lastname: Debray
authors.affiliation: Université Grenoble Alpes, Institut Néel, 38042 Grenoble, France and CNRS, Institut Néel, 38042 Grenoble, France.
authors.forename: P
authors.initials: P
authors.lastname: Lejay
authors.affiliation: European Synchrotron Radiation Facility, 6 rue Jules Horowitz, BP 220, 38043 Grenoble, France and CNRS, Université Bordeaux, ICMCB, UPR 9048, F-33600 Pessac, France.
authors.forename: A
authors.initials: A
authors.lastname: Cano
authors.affiliation: SPSMS-MDN, UMR-E CEA/UJF-Grenoble, INAC, 38054 Grenoble, France.
authors.forename: E
authors.initials: E
authors.lastname: Ressouche
authors.affiliation: Université Grenoble Alpes, Institut Néel, 38042 Grenoble, France and CNRS, Institut Néel, 38042 Grenoble, France.
authors.forename: V
authors.initials: V
authors.lastname: Simonet