Acoustic Faraday effect in Tb$_3$Ga$_5$O$_{12}$
Strongly Correlated Electrons
2015-05-19 v1
Abstract
The transverse acoustic wave propagating along the [100] axis of the cubic TbGaO (acoustic mode) is doubly degenerate. A magnetic field applied in the direction of propagation lifts this degeneracy and leads to the rotation of the polarization vector - the magneto-acoustic Faraday rotation. Here, we report on the observation and analysis of the magneto-acoustic Faraday-effect in TbGaO in static and pulsed magnetic fields. We present also a theoretical model based on magnetoelastic coupling of 4 electrons to both, acoustic and optical phonons and an effective coupling between them. This model explains the observed linear frequency dependence of the Faraday rotation angle.
Keywords
Cite
@article{arxiv.1006.0141,
title = {Acoustic Faraday effect in Tb$_3$Ga$_5$O$_{12}$},
author = {A. Sytcheva and U. Loew and S. Yasin and J. Wosnitza and S. Zherlitsyn and P. Thalmeier and T. Goto. P. Wyder and B. Luethi},
journal= {arXiv preprint arXiv:1006.0141},
year = {2015}
}