Direct measurement of polaron binding energy in AMnO$_{3}$ as a function of the A site ionic size by photoinduced IR absorption

Simple item page
dc.creatorMertelj, T.
dc.creatorHrovat, M.
dc.creatorKuščer, D.
dc.creatorMihailovic, D.
dc.date2000-05-04
dc.date.accessioned2026-07-07T02:37:33Z
dc.date.available2026-07-07T02:37:33Z
dc.descriptionPhotoinduced IR absorption was measured in undoped (LaMn)_{1-δ}O_{3} and (NdMn)_{1-δ}O_{3}. We observe broadening and a ~44% increase of the midinfrared anti-Jahn-Teller polaron peak energy when La^{3+} is replaced with smaller Nd^{3+}. The absence of any concurent large frequency shifts of the observed PI phonon bleaching peaks and the Brillouin-zone-center internal perovskite phonon modes measured by Raman and infrared spectroscopy indicate that the polaron peak energy shift is mainly a consequence of an increase of the electron phonon coupling constant with decreasing ionic radius <r_{A}> on the perovskite A site. This indicates that the dynamical lattice effects strongly contribute to the electronic band narrowing with decreasing <r_{A}> in doped giant magnetoresistance manganites.
dc.descriptionRevTex, 2 postscript figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0005088
dc.identifierhttp://arxiv.org/abs/cond-mat/0005088
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/16332
dc.subjectCondensed Matter
dc.titleDirect measurement of polaron binding energy in AMnO$_{3}$ as a function of the A site ionic size by photoinduced IR absorption
dc.typetext

Files

Collections

arXiv