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

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

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)11-16
Number of pages6
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume208
DOIs
Publication statusPublished - 2016 Apr 1
Externally publishedYes

Keywords

  • Angle-resolved photoemission spectroscopy
  • Correlated electron system
  • Mott-Hubbard systems
  • Self-energy

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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