02973nam 2200481 450 991048321970332120220123142946.0981-16-1026-610.1007/978-981-16-1026-4(CKB)4100000011930306(DE-He213)978-981-16-1026-4(MiAaPQ)EBC6627525(Au-PeEL)EBL6627525(OCoLC)1252421639(PPN)255883064(EXLCZ)99410000001193030620220123d2021 uy 0engurnn|008mamaatxtrdacontentcrdamediacrrdacarrierTheory of multipole fluctuation mediated superconductivity and multipole phase important roles of many body effects and strong spin-orbit coupling /Rina Tazai1st ed. 2021.Gateway East, Singapore :Springer,[2021]©20211 online resource (XVII, 118 p. 75 illus., 64 illus. in color.) Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053981-16-1025-8 General Introduction -- Functional Renormalization Group (fRG) study -- Cooperation of el-ph and AFM fluctuations for SC state -- S-wave superconductivity in CeCu2Si2 -- Multipole phase.A strong spin-orbit interaction and Coulomb repulsion featuring strongly correlated d- and f-electron systems lead to various exotic phase transition including unconventional superconductivity and magnetic multipole order. However, their microscopic origins are long standing problem since they could not be explained based on conventional Migdal-Eliashberg theorem. The book focuses on many-body correlation effects beyond conventional theory for the d- and f-electron systems, and theoretically demonstrates the correlations to play significant roles in “mode-coupling” among multiple quantum fluctuations, which is called U-VC here. The following key findings are described in-depth: (i) spin triplet superconductivity caused by U-VC, (ii) being more important U-VC in f-electron systems due to magnetic multipole degrees of freedom induced by a spin-orbit interaction, and (iii) s-wave superconductivity stabilized cooperatively by antiferromagnetic fluctuations and electron-phonon interaction contrary to conventional understanding. The book provides meaningful step for revealing essential roles of many-body effects behind long standing problems in strongly correlated materials.Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053SuperconductivitySuperconductivity.537.623Tazai Rina985254MiAaPQMiAaPQMiAaPQBOOK9910483219703321Theory of Multipole Fluctuation Mediated Superconductivity and Multipole Phase2251882UNINA