Role of spin-orbit interaction on the superconductivity in Nax CoO2 · y H2 O: Phase diagram under the magnetic field

Y. Yanase, M. Mochizuki, M. Ogata

Research output: Contribution to journalArticle

1 Citation (Scopus)


The d-vector in possible spin triplet superconductor Nax CoO2 · y H2 O is microscopically analyzed on the basis of the multi-orbital Hubbard model including the atomic spin-orbit coupling. As a result of the perturbation theory, it is shown that the d-vector is parallel to the plane when the pairing symmetry is p-wave, while both over(d, ^) ∥ xy and over(d, ^) ∥ z are possible in the f-wave state. We point out that the multiple phase transitions are expected under the in-plane magnetic field when the pairing symmetry is p-wave.

Original languageEnglish
Pages (from-to)873-874
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberSPEC. ISS.
Publication statusPublished - 2006 May 1



  • D-vector
  • Multiple phase diagram
  • Na CoO · y H O
  • Spin-orbit coupling

ASJC Scopus subject areas

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

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