DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2012 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DS: Fachverband Dünne Schichten

DS 10: Multiferroics II: Hexagonal manganites / Incommensurate multiferroics (jointly with MA, DF, KR, TT)

DS 10.5: Vortrag

Montag, 26. März 2012, 16:15–16:30, EB 301

Sinusoidal electromagnon in RMnO3: Indication of anomalous magnetoelectric coupling — •Markku Stenberg1 and Rogério de Sousa21Theoretical Physics, Saarland University, 66123 Saarbrücken, Germany — 2Department of Physics and Astronomy, University of Victoria, Victoria, B.C., V8W 3P6, Canada

The optical spectra in the family of multiferroic manganites RMnO3 is a great puzzle. Current models can not explain the fact that two strong electromagnons are present in the non-collinear spin cycloidal phase, with only one electromagnon surviving the transition into the collinear spin sinusoidal phase. We show that this is a signature of the presence of anomalous magnetoelectric coupling that breaks rotational invariance in spin space and generates oscillatory polarization in the ground state.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2012 > Berlin