Superconductivity in NaxCoO2·yH2O due to charge fluctuation

Yasuhiro Tanaka*, Youichi Yanase, Masao Ogata

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)


A new mechanism of superconductivity due to charge fluctuation in the newly discovered Co-based oxide is proposed. A single-band extended Hubbard model on a triangular lattice is studied within the random phase approximation, f-wave triplet superconductivity is stabilized in the vicinity of charge-density-wave instability, which is in sharp contrast to the square-lattice case. The physical origin of the realization of the f-wave triplet state as well as its relevance to experiments are discussed.

Original languageEnglish
Pages (from-to)319-322
Number of pages4
Journaljournal of the physical society of japan
Issue number2
Publication statusPublished - 2004 Feb
Externally publishedYes


  • Charge fluctuation
  • Co-based oxides
  • Triplet superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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