Correlated electronic states of SrVO3 revealed by angle-resolved photoemission spectroscopy

T. Yoshida, M. Kobayashi, K. Yoshimatsu, H. Kumigashira, A. Fujimori

研究成果: Article査読

11 被引用数 (Scopus)

抄録

In this article, we review recent progress in angle-resolved photoemission (ARPES) studies of the Mott-Hubbard-type correlated electron systems SrVO3. It has the d1 electron configuration and is an ideal model compound to study electron correlation effects in normal metal. ARPES studies of bulk single-crystal SrVO3 and CaVO3 have revealed the difference in the mass renormalization of electrons between them. In-situ ARPES studies of thin films fabricated by the pulsed laser deposition method have clarified not only quasi-particle dispersions, which show a kink like high-Tc cuprates, but also finite dispersions in the incoherent part. Self-energy in a wide energy range has been deduced from the ARPES spectral weight using Kramers-Kronig transformation. The obtained self-energy has several structures which yield the incoherent feature and a pseudogap-like dip similar to the high-Tc cuprates. Quantum-well states in ultrathin films of SrVO3 have revealed sub-bands with correlated electrons. These findings of electron correlation effects outlined in the present article would provide a starting point not only for fundamental condensed-matter physics but also for the development of new devices with correlated electrons.

本文言語English
ページ(範囲)11-16
ページ数6
ジャーナルJournal of Electron Spectroscopy and Related Phenomena
208
DOI
出版ステータスPublished - 2016 4 1
外部発表はい

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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