Hard X-ray photoemission study of Mn 2p core-levels of La 1-xSrxMnO3 thin films

K. Horiba, M. Taguchi, N. Kamakura, K. Yamamoto, A. Chainani, Y. Takata, E. Ikenaga, H. Namatame, M. Taniguchi, M. Awaji, A. Takeuchi, D. Miwa, Y. Nishino, K. Tamasaku, T. Ishikawa, H. Kumigashira, M. Oshima, M. Lippmaa, M. Kawasaki, H. KoinumaK. Kobayashi, S. Shin

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6 引文 斯高帕斯(Scopus)

摘要

In order to clarify the intrinsic bulk electronic structure of La 1-xSrxMnO3 (LSMO) thin films, we have performed high-energy (hν=5.95 keV) synchrotron photoemission spectroscopy (PES) of Mn 2p core-levels. In sharp contrast with the previous soft X-ray PES (hν=800-1486.6 eV), the high-energy PES spectra exhibit a clear additional peak at the low binding-energy side of the Mn 2p3/2 peak. To check for surface sensitivity, we measured take-off-angle dependence of Mn 2p core-levels. The results indicate that this additional peak originates from the bulk electronic structure. The peak shows a noticeable increase in the metallic phase of LSMO for x=0.2 and 0.4, indicating that the origin of this peak is strongly related to the metallic physical properties of LSMO thin films. A single ion (MO6) cluster calculation including charge transfer from doping-induced states reproduces the new bulk-derived feature observed in Mn 2p core-levels.

原文English
頁(從 - 到)557-559
頁數3
期刊Journal of Electron Spectroscopy and Related Phenomena
144-147
DOIs
出版狀態Published - 2005 六月

All Science Journal Classification (ASJC) codes

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

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