Correlation effects in Sr2RuO4 and Ca 2RuO4: Valence-band photoemission spectra and self-energy calculations

T. T. Tran*, T. Mizokawa, S. Nakatsuji, H. Fukazawa, Y. Maeno

*この研究の対応する著者

研究成果: Article査読

12 被引用数 (Scopus)

抄録

We have studied the electronic structure of Sr2RuO4 and Ca2RuO4 using x-ray photoemission spectroscopy (XPS) and subsequent model calculations. While the t2g band of Sr 2RuO4 has substantial spectral weight at the Fermi level, that of Ca2RuO4 has no spectral weight at EF and shows a peak at -1.8 eV. In the valence-band XPS spectrum of Sr 2RuO4, a satellite structure of the t2g band is observed. In order to explain the spectral features, we have carried out band-structure calculations using the unrestricted Hartree-Fock (HF) approximation and found good agreement with the experimental result for Ca 2RuO4. In order to explain the satellite structure of Sr2RuO4, we have performed second-order perturbation calculations of the self-energy corrections around the unrestricted HF solution of Sr2RuO4.

本文言語English
論文番号153106
ページ(範囲)153106-1-153106-4
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
70
15
DOI
出版ステータスPublished - 2004 10
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

フィンガープリント

「Correlation effects in Sr<sub>2</sub>RuO<sub>4</sub> and Ca <sub>2</sub>RuO<sub>4</sub>: Valence-band photoemission spectra and self-energy calculations」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。

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