Spectral evidence for inherent "dead layer" formation at La 1-ySryFeO3/La1-xSr xMnO3 heterointerface

R. Hashimoto, A. Chikamatsu, H. Kumigashira, M. Oshima, N. Nakagawa, T. Ohnishi, M. Lippmaa, H. Wadati, A. Fujimori, K. Ono, M. Kawasaki, H. Koinuma

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We have investigated the electronic structure of a La0.6Sr 0.4FeO3 (LSFO)/La0.6Sr0.4MnO 3 (LSMO) heterointerface using Mn 2p-3d resonant photoemission spectroscopy and X-ray absorption spectroscopy. We have found that the spectral intensity of eg↑ states near the Fermi level is gradually reduced with increasing LSFO overlayer thickness. The spectral behavior is quite similar to that of hole-doped LSMO films, indicating hole-doping in LSMO layers. We have also found that Fe 2p X-ray absorption spectrum of a LSMO/LSFO/LSMO trilayer shows the spectral evidence for electron doping in the corresponding LSFO layer. These results indicate the occurrence of charge transfer at interfaces between LSMO and LSFO layers.

Original languageEnglish
Pages (from-to)479-481
Number of pages3
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume144-147
DOIs
Publication statusPublished - 2005 Jun
Externally publishedYes

Keywords

  • Charge transfer
  • LaSrMnO
  • Laser-MBE
  • Photoemission spectroscopy

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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