Theory of the striped superconductor

Erez Berg, Eduardo Fradkin, Steven A. Kivelson

Research output: Contribution to journalArticlepeer-review

Abstract

We define a distinct phase of matter, a pair-density wave (PDW), in which the superconducting order parameter □ (r, r ′) varies periodically as a function of position such that when averaged over the center of mass position, (r + r ′) /2, all components of □ vanish identically. Specifically, we study the simplest unidirectional PDW, the "striped superconductor, " which we argue may be at the heart of a number of spectacular experimental anomalies that have been observed in the failed high-temperature superconductor La2-x Bax CuO4. We present a solvable microscopic model with strong electron-electron interactions which supports a PDW ground state. We also discuss, at the level of Landau theory, the nature of the coupling between the PDW and other order parameters and the origins and some consequences of the unusual sensitivity of this state to quenched disorder.

Original languageEnglish (US)
Article number064515
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number6
DOIs
StatePublished - Feb 12 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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