Two-particle self-consistent approach to unconventional superconductivity

Research output: Contribution to journalArticle

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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 - Mar 19 2012
Externally publishedYes

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Superconductivity
superconductivity
sum rules
Momentum
magnetic permeability
momentum
coupled modes
retarding
insulators
symmetry
interactions

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Two-particle self-consistent approach to unconventional superconductivity. / Otsuki, Junya.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 85, No. 10, 104513, 19.03.2012.

Research output: Contribution to journalArticle

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