Electron–Phonon-Induced Superconductivity

  • Marvin L. Cohen
Article

Abstract

Some background regarding the evolution of calculations, predictions, and approaches to understand and increase T c for phonon-mediated superconductivity is presented. This is followed by a description of a successful “after the fact” theoretical study of MgB2 and a description of current thinking about the relationship between phonon renormalization and T c. It is then argued that in the search for high T cs the evolution has gone from searching for high density of states materials to high electron–phonon couplings described by λ. Finally, it is suggested that the focus on finding large λ can be supplemented by a search for large electronic spring constants η. This is expected to be particularly relevant for the highest T c materials in this class of superconductors.

Keywords

Superconductivity electron-phonon interactions superconducting transition temperature maximizing 

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Copyright information

© Springer Science + Business Media, Inc. 2006

Authors and Affiliations

  • Marvin L. Cohen
    • 1
    • 2
  1. 1.Department of PhysicsUniversity of CaliforniaBerkeleyUSA
  2. 2.Materials Sciences DivisionLawrence Berkeley National LaboratoryBerkeleyUSA

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