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.
By:
Rina Tazai Imprint: Springer Verlag, Singapore Country of Publication: Singapore Edition: 2021 ed. Dimensions:
Height: 235mm,
Width: 155mm,
Weight: 221g ISBN:9789811610288 ISBN 10: 9811610282 Series:Springer Theses Pages: 118 Publication Date:20 May 2022 Audience:
Professional and scholarly
,
Undergraduate
Format:Paperback Publisher's Status: Active
General Introduction.- Functional Renormalization Group (fRG) study.- Cooperation of el-ph and AFM fluctuations for SC state.- S-wave superconductivity in CeCu2Si2.- Multipole phase.