Temperature-dependent electronic structure of Nd1-xSmxNiO3

K. Okazaki, T. Mizokawa, A. Fujimori, E. V. Sampathkumaran, J. A. Alonso

研究成果: Article査読

4 被引用数 (Scopus)

抄録

RNiO3 (R: rare earth) is one of the typical bandwidth-control metal-insulator transition systems. Its metal-insulator transition temperature (TMI) is the same as the antiferromagnetic transition temperature (TN) for R = Pr and Nd, while TMI is higher than TN for R = Sm and Eu. The boundary between the two types of phase transitions is located between NdNiO3 and SmNiO3. We have measured photoemission spectra of Nd1-xSmxNiO3 at various temperatures above and below TMI. The spectra show quite different temperature dependences between x ≤ 0.4 and x ≥ 0.6. For x ≤ 0.4, the spectral intensity near the Fermi level (EF) is temperature-dependent even well below TMI, while for x ≥ 0.6 it shows a significant temperature dependence only near TMI. Also, the spectra near EF above TMI show a pseudo-gap like behavior for x ≥ 0.6. From these results, we conclude that the metallic phase has different natures between x ≤ 0.4 and x ≥ 0.6.

本文言語English
ページ(範囲)975-978
ページ数4
ジャーナルJournal of Physics and Chemistry of Solids
63
6-8
DOI
出版ステータスPublished - 2002
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

フィンガープリント

「Temperature-dependent electronic structure of Nd<sub>1-x</sub>Sm<sub>x</sub>NiO<sub>3</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル