Infrared response of ordered polarons in layered perovskites
Journal Article
·
· Physical Review, B: Condensed Matter
- Istituto Nazionale di Fisica della Materia, Dipartimento di Fisica, Universita di Roma ``La Sapienza,`` Piazzale A. Moro 2, I-00185 Roma (Italy)
- AT&T Bell Laboratories, Murray Hill, New Jersey 07974 (United States)
We report on the infrared absorption spectra of three oxides, where charged superlattices have been recently observed in diffraction experiments. In La{sub 1.67}Sr{sub 0.33}NiO{sub 4}, polaron localization is found to suppress the low-energy conductivity through the opening of a gap and to split the {ital E}{sub 2{ital u}}-{ital A}{sub 2{ital u}} vibrational manifold of the oxygen octahedra. Similar effects are detected in Sr{sub 1.5}La{sub 0.5}MnO{sub 4} and in La{sub 2}NiO{sub 4+{ital y}}, with peculiar differences related to the type of charge ordering. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 385716
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 54; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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