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

研究成果: Article査読

17 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号073101
ページ(範囲)731011-731014
ページ数4
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
67
7
出版ステータスPublished - 2003 2 15
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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