Sinusoidal electromagnon in RMnO3: Indication of anomalous magnetoelectric coupling
Artikel i vetenskaplig tidskrift, 2012

The optical spectra in the family of multiferroic manganites RMnO3 is a great puzzle. Current models cannot explain the fact that two strong electromagnons are present in the noncollinear 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.

manganites

multiferroics

Författare

Markku Stenberg

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

R. de Sousa

University of Victoria

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 85 Article Number: 104412 - 104412

Ämneskategorier

Fysik

DOI

10.1103/PhysRevB.85.104412