English

Observation of Anomalous Phonons in E-Type Orthorhombic REMnO3

Strongly Correlated Electrons 2010-12-15 v1
Authors: P. Gao , H. Y. Chen , T. A. Tyson , Z. X. Liu , J. M. Bai , L. P. Wang , Y. J. Choi , S. -W. Cheong
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Abstract

We observe the appearance of a phonon near the lock-in temperature in orthorhombic REMnO3 (RE: Lu and Ho) and anomalous phonon hardening in orthorhombic LuMnO3. The anomalous phonon occurs at the onset of spontaneous polarization. No such changes were found in incommensurate orthorhombic DyMnO3. These observations directly reveal different electric polarization mechanisms in the E-type and IC-type REMnO3.

Keywords

anomalous phonons remno3 lock-in temperature spontaneous polarization electric polarization mechanism e-type orthorhombic ic-type orthorhombic

Cite

@article{arxiv.1012.3066,
  title  = {Observation of Anomalous Phonons in E-Type Orthorhombic REMnO3},
  author = {P. Gao and H. Y. Chen and T. A. Tyson and Z. X. Liu and J. M. Bai and L. P. Wang and Y. J. Choi and S. -W. Cheong},
  journal= {arXiv preprint arXiv:1012.3066},
  year   = {2010}
}

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