Magnetism and superconductivity in the two-dimensional 16-band d-p model for iron-based superconductors

Yuki Yanagi, Youichi Yamakawa, Yoshiaki Ono

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

The electronic states of the Fe2As2 plane in iron-based superconductors are investigated on the basis of the two-dimensional 16-band d-p model which includes the Coulomb interaction on a Fe site: the intra-and inter-orbital direct terms U and U′, the Hund's coupling J and the pair-transfer J′. Using the random phase approximation (RPA), we obtain the magnetic phase diagram including the stripe and the incommensurate order on the U′-J plane. We also solve the superconducting gap equation within the RPA and find that, for large J, the most favorable pairing symmetry is extended s-wave whose order parameter changes its sign between the hole pockets and the electron pockets, while it is dxy-wave for small J.

Original languageEnglish
Article number123701
Journaljournal of the physical society of japan
Volume77
Issue number12
DOIs
Publication statusPublished - 2008 Dec 1
Externally publishedYes

Keywords

  • 16-band d-p model
  • Hund's coupling
  • Iron-based superconductors
  • Pairing symmetry
  • RPA

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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