Strong coupling theory of superconductivity

D. Rainer, J. A. Sauls

Research output: Contribution to journalArticlepeer-review


The electronic properties of correlated metals with a strong electron-phonon coupling may be understood in terms of a combination of Landau's Fermi-liquid theory and the strong-coupling theory of Migdal and Eliashberg. In these lecture notes we discuss the microscopic foundations of this phenomenological Fermi-liquid model of correlated, strong-coupling metals. We formulate the basic equations of the model, which are quasiclassical transport equations that describe both equilibrium and non-equilibrium phenomena for the normal and superconducting states of a metal. Our emphasis is on superconductors close to equilibrium, for which we derive the general linear response theory. As an application we calculate the dynamical conductivity of strong-coupling superconductors.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Sep 14 2018

ASJC Scopus subject areas

  • General

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