Theoretical Study of Electron Correlation Driven Superconductivity in Systems with Coexisting Wide and Narrow Bands

  • Daisuke Ogura

Part of the Springer Theses book series (Springer Theses)

Table of contents

  1. Front Matter
    Pages i-xxi
  2. Daisuke Ogura
    Pages 1-10
  3. Daisuke Ogura
    Pages 11-23
  4. Daisuke Ogura
    Pages 25-74
  5. Daisuke Ogura
    Pages 113-114
  6. Back Matter
    Pages 115-122

About this book


This book deals with the study of superconductivity in systems with coexisting wide and narrow bands. It has been previously suggested that superconductivity can be enhanced in systems with coexisting wide and narrow bands when the Fermi level is near the narrow band edge. In this book, the authors study two problems concerning this mechanism in order to: (a) provide a systematic understanding of the role of strong electron correlation effects, and (b) propose a realistic candidate material which meets the ideal criteria for high-Tc superconductivity.

Regarding the role of strong correlation effects, the FLEX+DMFT method is adopted. Based on systematic calculations, the pairing mechanism is found to be indeed valid even when the strong correlation effect is considered within the formalism. In the second half of the book, the authors propose a feasible candidate material by introducing the concept of the “hidden ladder” electronic structure, arising from the combination of the bilayer lattice structure and the anisotropic orbitals of the electrons. As such, the book contributes a valuable theoretical guiding principle for seeking unknown high-Tc superconductors.


High Temperature Superconductivity in Cuprates Electron Correlation Driven Cooper Pairs FLEX+DMFT Method for Superconductivity Hidden Ladders in Ruddlesden-Popper type Layered Perovskite Tight-Binding Model from First-Principles Calculations

Authors and affiliations

  • Daisuke Ogura
    • 1
  1. 1.Department of PhysicsOsaka UniversityOsakaJapan

Bibliographic information