Madelung potentials and covalency effect in strained La1-x Srx MnO3 thin films studied by core-level photoemission spectroscopy

H. Wadati, A. Maniwa, A. Chikamatsu, H. Kumigashira, M. Oshima, T. Mizokawa, A. Fujimori, G. A. Sawatzky

研究成果: Article査読

9 被引用数 (Scopus)

抄録

We have studied the effects of Madelung potentials on the shifts in the core-level photoemission spectra by investigating La0.6 Sr0.4 MnO3 thin films grown on three kinds of substrates, SrTiO3, (LaAlO3) 0.3 - (SrAl0.5 Ta0.5 O3) 0.7, and LaAlO3. The experimental shifts in the La4d and Sr3d core levels are almost the same as the calculated Madelung potentials, which we attribute to the nearly ionic character of these atoms. On the other hand, the experimental shifts in the O1s and Mn2p core levels are negligibly small. We consider that this is due to the strong covalent character of the Mn-O bonds.

本文言語English
論文番号125107
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
80
12
DOI
出版ステータスPublished - 2009 9 11
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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