Colossal magnon-phonon coupling in multiferroic Eu$_{0.75}$Y$_{0.25}$MnO$_3$

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dc.creatorAguilar, R. Valdés
dc.creatorSushkov, A. B.
dc.creatorZhang, C. L.
dc.creatorChoi, Y. J.
dc.creatorCheong, S. -W.
dc.creatorDrew, H. D.
dc.date2007-04-26
dc.date2007-07-24
dc.date.accessioned2026-07-07T08:37:12Z
dc.date.available2026-07-07T08:37:12Z
dc.descriptionWe report the spectra of magnetically induced electric dipole absorption in Eu$_{0.75}$Y$_{0.25}$MnO$_3$ from temperature dependent far infrared spectroscopy (10-250 cm$^{-1}$). These spectra, which occur only in the $e||a$ polarization, consist of two relatively narrow electromagnon features that onset at $T_{FE}=30$ K and a broad absorption band that persists to temperatures well above $T_N=47$ K. The observed excitations account for the step up of the static dielectric constant in the ferroelectric phase. The electromagnon at 80 cm$^{-1}$ is observed to be strongly coupled to the nearby lowest optical phonon which transfers more than 1/2 of its spectral weight to the magnon. We attribute the origin of the broad background absorption to the two magnon emission decay process of the phonon.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0704.3632
dc.identifierhttp://arxiv.org/abs/0704.3632
dc.identifierPhysical Review B 76 060404(R) (2007)
dc.identifierdoi:10.1103/PhysRevB.76.060404
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/140321
dc.subjectMaterials Science
dc.subjectStrongly Correlated Electrons
dc.titleColossal magnon-phonon coupling in multiferroic Eu$_{0.75}$Y$_{0.25}$MnO$_3$
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