Possible display of phason mode of electromagnons in TbMnO3

Details Possible display of phason mode of electromagnons in TbMnO3 Possible display of phason mode of electromagnons in TbMnO3

2007-02-27

arxiv.org/abs/cond-mat/0702636v1

Physics

Condensed Matter

Other Condensed Matter

5 pages, 1 figure

Scientific paper

The interaction of light in terahertz frequency region with electromagnons in a sinusoidal incommensurate magnetic state in TbMnO3 is studied. A significant change in the frequency dependence of the dielectric constant e_zz near the temperature of the phase transition from sinusoidal magnetic ordering to spiral spin structure with a spontaneous electric poiarization is predicted. Phason mode of this phase transition is the mode of electromagnon with ME coupling proportional to the wave number of modulation structure.

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