Universal character of CoO2 plane studied by high-resolution angle-resolved photoemission

T. Arakane, T. Sato, T. Takahashi, H. Ding, T. Fujii, A. Asamitsu

Research output: Contribution to journalArticlepeer-review

Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy on Mx CoO2 (M: Na, K, Rb) to clarify the band dispersion and Fermi surface inherent to CoO2 plane. We have found that a1 g band which forms a large hexagonal Fermi surface centered at Γ(A) point shows a dispersion kink at approximately 100 meV binding energy, irrespective of the species of alkali metals and its content (x). We discuss the origin of kink in the dispersion in terms of the strong mass renormalization due to electron-phonon interaction and/or the hybridization of a1 g and eg bands.

Original languageEnglish
Pages (from-to)1086-1088
Number of pages3
JournalPhysica B: Condensed Matter
Volume403
Issue number5-9
DOIs
Publication statusPublished - 2008 Apr 1

Keywords

  • ARPES
  • Cobaltate
  • M CoO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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