In situ angle-resolved photoemission study of half-metallic La0.6 Sr0.4 MnO3 thin films

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

Research output: Contribution to journalArticlepeer-review

Abstract

We have performed an in situ angle-resolved photoemission spectroscopy (ARPES) on single-crystal surfaces of La0.6 Sr0.4 MnO3 (LSMO) thin films to investigate the electronic structure near the Fermi level (EF). ARPES spectra near EF reveal the existence of a dispersive Mn-3d derived conduction band indicative of an electron pocket centered at the Γ point. Comparing the experimental band structure with the local density approximation + U band-structure calculation, the estimated size of the Fermi surface is consistent with the prediction of the calculation, while the measured bandwidth is significantly narrower than the calculation. The discrepancy between the two suggests that the renormalization effect is significant due to the strong electron correlation in LSMO.

Original languageEnglish
Pages (from-to)1030-1032
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 2
DOIs
Publication statusPublished - 2007 Mar
Externally publishedYes

Keywords

  • Angle-resolved photoemission spectroscopy
  • Band structure
  • La Sr MnO thin film
  • Laser MBE

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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