Low-lying electronic structure of triangular cobaltite

A. P. Kuprin, M. Z. Hasan, Y. D. Chuang, D. Qian, M. Foo, R. J. Cava

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We report detailed Fermi surface topology and quasiparticle dynamics of the host cobaltate Na0.7CoO2. A direct mapping of the Fermi surface is carried out by angle-resolved photoemission spectroscopy (ARPES). Fermi surface at 16 K is a hole-pocket centered around the Γ-point. A highly correlated nature of the electron liquid in this system is evidenced from strong on-site Coulomb interaction seen through a valence satellite and via renormalization of the quasiparticle dispersion. The quasiparticle band disperses less than 100 meV and exists in the T-linear regime of resistivity up to 120 K.

Original languageEnglish (US)
Pages (from-to)235-238
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume67
Issue number1-3
DOIs
StatePublished - Jan 1 2006

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Keywords

  • A. Oxides
  • A. Superconductors
  • C. Photoelectron spectroscopy
  • D. Electronic structure
  • D. Fermi surface

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