Two-particle self-consistent approach to unconventional superconductivity

Junya Otsuki

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A nonperturbative approach to unconventional superconductivity is developed based on the idea of two-particle self-consistent (TPSC) theory by Vilk and Tremblay. A sum rule, which the momentum-dependent pairing susceptibility satisfies, is derived. An effective pairing interaction between quasiparticles is determined so that the susceptibility should fulfill this exact sum rule, in which fluctuations belonging to different symmetries couple at finite momentum. It is demonstrated that the mode coupling between d-wave and s-wave pairing fluctuations leads to suppression of the d-wave fluctuation near the Mott insulator.

Original languageEnglish
Article number104513
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number10
DOIs
Publication statusPublished - 2012 Mar 19

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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