Crossover in the nature of the metallic phases in the perovskite-type RNiO3

K. Okazaki, T. Mizokawa, A. Fujimori, E. V. Sampathkumaran, M. J. Martinez-Lope, J. A. Alonso

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We have measured the photoemission spectra of Nd1-xSmxNiO3, where the metal-insulator transition and the Néel ordering occur at the same temperature for x≲0.4 and the metal-insulator transition temperature (TMI) is higher than the Néel temperature for x≳0.4. For x≤0.4, the spectral intensity at the Fermi level is high in the metallic phase above TMI and gradually decreases with cooling in the insulating phase below TMI while for x>0.4 it shows a pseudogaplike behavior above TMI and further diminishes below TMI. The results clearly establish that there is a change in the nature of the electronic correlations in the middle (x∼0.4) of the metallic phase of the RNiO3 system.

Original languageEnglish
Article number073101
Pages (from-to)731011-731014
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number7
Publication statusPublished - 2003 Feb 15
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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