Photoemission measurements of transition-metal oxides under laser illumination

J. W. Quilty, J. Y. Son, T. Mizokawa, D. Asakura, N. Motoyama, S. Uchida, T. Kimura, Y. Tokura

研究成果: Article査読

抄録

The effects of photoexcitation on Sr14-xCaxCu 24O41 and La2-2xSr1+2xMn 2O7 single crystals were measured via X-ray photoemission spectroscopy. Changes observed in the Sr14-xCaxCu 24O41 Cu 2p core-level line shape indicate that the cleaved surface is surprisingly unstable under vacuum and that changes in the surface stoichiometry are easily obtained with laser ablation. In La 2-2xSr1+2xMn2O7, the O 1s core-level peak binding energy irreversibly increases upon optical excitation. The magnitude of the increase depends on the sample hole doping and is observed to be largest in a x=0.5 sample, where phase competition between electronic ordered states is strongest. It appears that the photoinduced electronic structural change is permanent due to stabilization by strong electron-lattice coupling.

本文言語English
ページ(範囲)909-912
ページ数4
ジャーナルJournal of Electron Spectroscopy and Related Phenomena
144-147
DOI
出版ステータスPublished - 2005 6
外部発表はい

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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