Superconductivity from repulsive interaction

Saurabh Maiti, Andrey V. Chubukov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

21 Scopus citations

Abstract

The BCS theory of superconductivity named electron-phonon interaction as a glue that overcomes Coulomb repulsion and binds fermions into pairs which then condense and super-conduct. We review recent and not so recent works aiming to understand whether a nominally repulsive Coulomb interaction can by itself give rise to a superconductivity. We first discuss a generic scenario of the pairing by electron-electron interaction, put forward by Kohn and Luttinger back in 1965, and then turn to modern studies of the electronic mechanism of superconductivity in the lattice models for the cuprates, the Fe-pnictides, and the doped graphene. We show that the pairing in all three classes of materials can be viewed as lattice version of Kohn-Luttinger physics, despite that the pairing symmetries are different. We discuss under what conditions the pairing occurs and rationalize the need to do parquet renormalization-group analysis. We also discuss the interplay between superconductivity and density-wave instabilities.

Original languageEnglish (US)
Title of host publicationLectures on the Physics of Strongly Correlated Systems XVII - Seventeenth Training Course in the Physics of Strongly Correlated Systems
Pages3-73
Number of pages71
DOIs
StatePublished - 2013
Event17th Training Course in the Physics of Strongly Correlated Systems - Vietri sul Mare, Salerno, Italy
Duration: Oct 1 2012Oct 12 2012

Publication series

NameAIP Conference Proceedings
Volume1550
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other17th Training Course in the Physics of Strongly Correlated Systems
CountryItaly
CityVietri sul Mare, Salerno
Period10/1/1210/12/12

Keywords

  • Kohn-Luttinger Mechanism
  • Renormalization group
  • Superconductivity
  • mechanism of high Tc

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