Electromagnon and phonon excitations in multiferroic TbMnO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>

Alain Sacuto, Maximilien Cazayous, Yann Gallais, M. A. Measson, P. Rovillain, Jian Liu, Hideaki Sakata

doi:10.48550/arxiv.1207.5566

説明

We have performed Raman measurements on TbMnO3 single crystal under magnetic field along the three crystallographic directions. The flip of the spin spiral plane creates an electromagnon excitation. In addition to the electromagnons induced by the Heisenberg coupling, we have detected the electromagnon created by the Dzyaloshinskii-Moriya interaction along the c axis. We have identified all the vibrational modes of TbMnO3. Their temperature dependences show that only one phonon observed along the polarization axis is sensitive to the ferroelectric transition. This mode is tied to the Tb3+ ion displacements that contribute to the ferroelectric polarization.

収録刊行物

Physical Review B

Physical Review B 86 2012-07-30

American Physical Society (APS)

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詳細情報詳細情報について

CRID: 1871709542613343616

DOI: 10.1103/physrevb.86.014437; 10.48550/arxiv.1207.5566

ISSN: 1550235X; 10980121

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