Unified origin for superconductivity, magnetism, and large thermopower in Nax CoO2

K. Kuroki, R. Arita, S. Okubo, T. Nojima, H. Usui, S. Onari, Y. Tanaka

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We argue that the large thermopower, magnetism, and superconductivity observed in Nax CoO2 share the same origin, namely, the peculiar shape of the a1 g band. Superconductivity and magnetism arise from the local minimum structure of the band at the Γ point, while the thermopower originates from the overall "pudding mold" shape of the band. Our study shows the importance of the band structure and the Fermi surface even in strongly correlated systems.

Original languageEnglish
Pages (from-to)3360-3364
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Issue number12
Publication statusPublished - Dec 2008


  • 74.20.Mn
  • 75.30.Fv
  • D. Fermi surface
  • D. Superconductivity

ASJC Scopus subject areas

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


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