Symmetry of superconducting pairing state in a staggered field

Keisuke Shigeta, Seiichiro Onari, Yukio Tanaka

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In order to investigate the symmetry of a superconducting (SC) pairing state in a staggered field, we solve the linearized Iliashberg's equation based on the random phase approximation and the fluctuation exchange approximation in the Hubbard model under a staggered field. We show that an odd-frequency spin-triplet (equal-spin) s-wave pairing state can be realized in the system. It is caused by the fact that the staggered field suppresses the in-plane spin susceptibility and enhances the charge susceptibility. The latter is due to a spin-dependent modulation in the electron density. The result suggests that the antiferromagnetic (AF) background gives a contribution inherently different from the AF spin fluctuation to SC pairing state.

Original languageEnglish
Article number224509
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number22
DOIs
Publication statusPublished - Jun 7 2012
Externally publishedYes

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Spin fluctuations
Hubbard model
Spin waves
Carrier concentration
Modulation
symmetry
magnetic permeability
approximation
magnons
modulation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Symmetry of superconducting pairing state in a staggered field. / Shigeta, Keisuke; Onari, Seiichiro; Tanaka, Yukio.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 85, No. 22, 224509, 07.06.2012.

Research output: Contribution to journalArticle

Shigeta, Keisuke ; Onari, Seiichiro ; Tanaka, Yukio. / Symmetry of superconducting pairing state in a staggered field. In: Physical Review B - Condensed Matter and Materials Physics. 2012 ; Vol. 85, No. 22.
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