Manifestation of correlation effects in the photoemission spectra of Ca1-x Srx Ru O3

M. Takizawa, D. Toyota, H. Wadati, A. Chikamatsu, H. Kumigashira, A. Fujimori, M. Oshima, Z. Fang, M. Lippmaa, M. Kawasaki, H. Koinuma

研究成果: Article査読

53 被引用数 (Scopus)

抄録

We have measured soft x-ray photoemission and O 1s x-ray absorption spectra of Ca1-x Srx Ru O3 thin films prepared in situ. The coherent and incoherent parts have been identified in the bulk component of the photoemission spectra, and spectral weight transfer from the coherent to the incoherent part has been observed with decreasing x, namely, with increasing orthorhombic distortion. We propose that, while the Ru 4d one-electron bandwidth does not change with x, the distortion, and hence the splitting of the t2g band, effectively increases electron correlation strength. Although strong mass enhancement is found in the electronic specific heat data, the coherent part remains wide, suggesting enhanced band narrowing only in the vicinity of EF.

本文言語English
論文番号060404
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
72
6
DOI
出版ステータスPublished - 2005 8 1
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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