Origin of electromagnon excitations in \textit{R}MnO$_3$

R. Valdés Aguilar; M. Mostovoy; A. B. Sushkov; C. L. Zhang; Y. J. Choi; S-W. Cheong; H. D. Drew

doi:10.1103/PhysRevLett.102.047203

Origin of electromagnon excitations in \textit{R}MnO$_3$

Strongly Correlated Electrons 2009-01-29 v2 Materials Science

Authors: R. Valdés Aguilar , M. Mostovoy , A. B. Sushkov , C. L. Zhang , Y. J. Choi , S-W. Cheong , H. D. Drew

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

The origin of electromagnon excitations in cycloidal \textit{R}MnO $_3$ is explained in terms of the Heisenberg coupling between spins despite the fact that the static polarization arises from the much weaker Dzyaloshinskii-Moriya (DM) exchange interaction. We present a model that incorporates structural characteristics of this family of manganites that is confirmed by far infrared transmission data as a function of temperature and magnetic field and inelastic neutron scattering results. A deep connection is found between the magnetoelectric dynamics of the spiral phase and the static magnetoelectric coupling in the collinear E-phase of this family of manganites.

Keywords

electromagnon cycloidal manganites Heisenberg coupling Dzyaloshinskii-Moriya interaction magnetoelectric coupling inelastic neutron scattering

Cite

@article{arxiv.0811.2966,
  title  = {Origin of electromagnon excitations in \textit{R}MnO$_3$},
  author = {R. Valdés Aguilar and M. Mostovoy and A. B. Sushkov and C. L. Zhang and Y. J. Choi and S-W. Cheong and H. D. Drew},
  journal= {arXiv preprint arXiv:0811.2966},
  year   = {2009}
}

Comments

4 pages, 3 figures, submitted

Origin of electromagnon excitations in \textit{R}MnO$_3$

Abstract

Keywords

Cite

Comments

Related papers