In situ angle-resolved photoemission study on La1 - XSr xMnO3 thin films grown by laser MBE

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

研究成果: Article査読

3 被引用数 (Scopus)

抄録

We have performed an in situ angle-resolved photoemission study of atomically flat surfaces of La1 - xSrxMnO3 (LSMO) single-crystal thin films grown on SrTiO3 (0 0 1) substrates by laser molecular beam epitaxy, and investigated the changes in the band structure induced by hole-doping. The band structures of LSMO x = 0.4 thin films consist of several highly dispersive O 2p-derived bands at the binding energies of 2.5-7 eV, almost dispersionless Mn 3d t2g bands at ∼2 eV, and a dispersive Mn 3d eg-derived majority band at ∼0.5 eV. We find that the energy positions of these bands monotonically shift toward higher binding energy with decreasing hole concentration in a rigid-band manner, whereas the lower binding energy part of the eg-derived emission within 1.5 eV of the Fermi level (EF) gradually disappears. These results suggest that the simple rigid-band model does not describe the electronic structure near EF of LSMO.

本文言語English
ページ(範囲)511-514
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月
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 放射線
  • 原子分子物理学および光学
  • 凝縮系物理学
  • 分光学
  • 物理化学および理論化学

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