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|Type:||Artigo de periódico|
|Title:||Possible Common Ground For The Metal-insulator Phase Transition In The Rare-earth Nickelates Rnio3 (r = Eu, Ho, Y)|
|Author:||De la Cruz F.P.|
|Abstract:||We report on the infrared spectra of RNiO3 (R = Eu, Ho, Y). They provide evidence of phonon and insulating gap behavior and point to the monoclinic distortion at the metal-insulator (MI) transition as a feature for all RNiO3 (R ≠ La). We hypothesize that the intermediate paramagnetic phase (above TN and below TMI) in RNiO3 (R = Sm, Eu, Ho, Y) might be consequence of a self-doping effect, gradually triggering a phase segregation in electron-rich and electron-poor regions. This picture is concomitant to the temperature-dependent effect of octahedral tilting and distortion and self-trapped electrons in a polaronic medium.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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