We have performed an in situ synchrotron radiation photoemission spectroscopy (SRPES) on well-ordered surfaces of La1-xSr xMnO3 (x = 0, 0.2, 0.4, 0.55) thin films grown using laser molecular beam epitaxy (laser-MBE). The laser MBE chamber is connected to a high-resolution SRPES system, where the grown films are transferred from the laser MBE to the SRPES chamber without breaking the ultrahigh-vacuum. In sharp contrast with the previous PES spectra recorded from scraped polycrystalline samples, the SRPES spectra exhibit an existence of prominent Mn 3d eg states near the Fermi level. On the other hand, O 1s X-ray absorption spectra for laser-MBE-grown samples are in good agreement with the scraped ones. These results clearly indicate the importance of in situ SRPES measurement on well-ordered surfaces of transition metal oxides for revealing their intrinsic electronic structures.
|ジャーナル||Journal of Electron Spectroscopy and Related Phenomena|
|出版ステータス||Published - 2004 5|
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