In situ photoelectron spectroscopy of LaMnO3 and La 0.6Sr0.4MnO3 thin films grown by laser molecular beam expitaxy

M. Oshima, D. Kobayashi, K. Horiba, H. Ohguchi, H. Kumigashira, K. Ono, N. Nakagawa, M. Lippmaa, M. Kawasaki, H. Koinuma

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We have constructed a high-resolution photoelectron spectroscopy system combined with a laser molecular beam epitaxy (laser-MBE) chamber and have characterized composition-controlled La1-xSrxMnO 3 (LSMO) thin films. The importance of atomically flat surfaces by in situ photoelectron spectroscopy for revealing the intrinsic electronic structures has been demonstrated by comparing O1s, O2s and valence band spectra from the laser-MBE-grown LaMnO3 and LSMO films with those from the scraped samples. Even for the laser-MBE-grown LSMO films, core levels and band structure exhibit strong dependence on surface morphology. For atomically flat LSMO films, we have also elucidated the hole-doping features into Mn3d e g band by substituting La with Sr by resonant photoelectron spectra.

Original languageEnglish
Pages (from-to)145-149
Number of pages5
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume137-140
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2004 Jul 1
Externally publishedYes

Keywords

  • Hole-doping
  • LaMnO
  • Laser molecular beam expitaxy
  • Photoelectron spectroscopy
  • Thin films

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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