2011/12/20 by Junya Otsuki
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Homogeneous space #Insulator (electricity) #Mathematics #Momentum (technical analysis) #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum electrodynamics #Quantum mechanics #Quasiparticle #Rare-earth and actinide compounds #Superconductivity #Wave–particle duality #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.85.104513
published as Phys. Rev. B 85, 104513 (2012) · 7 pages, 5 figures
arxiv created 2011/12/20 · openalex publication_date 2012/03/19 · arxiv updated 2012/03/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.