Theory of Fulde-Ferrell-Larkin-Ovchinnikov state of superconductors with and without inversion symmetry: Hubbard model approach

Takehito Yokoyama, Seiichiro Onari, Yukio Tanaka

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We study Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state of superconductors with and without inversion symmetry based on the Hubbard model on the square lattice near half-filling, using the random phase approximation. We show that center of mass momentum Q tends to be parallel to x- or y-axis in the presence of inversion symmetry, while Q vector is likely to be perpendicular to the magnetic field in the absence of inversion symmetry. We also clarify that d + f-wave pairing is favored and the hetero spin triplet f-wave state is present in the FFLO state unlike state in the superconductors only with the Rashba type spin-orbit coupling (RSOC) originating from the broken inversion symmetry. The triplet f-wave state is enhanced by magnetic field and the RSOC. This stems from the reduction of the spin susceptibilities by the magnetic field and the RSOC.

Original languageEnglish
Article number064711
Journaljournal of the physical society of japan
Volume77
Issue number6
DOIs
Publication statusPublished - Jun 1 2008

Keywords

  • Fulde-Ferrell-Larkin-Ovchinnikov state
  • Hubbard model
  • Noncentrosymmetric superconductor

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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