Pairing glue activation in cuprates within the quantum critical regime

Josef Ashkenazi, Neil F Johnson

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A grand challenge in many-body quantum physics is to explain the apparent connection between quantum criticality and high-temperature superconductivity in the cuprates and similar systems, such as the iron pnictides and chalcogenides. Here we argue that the quantum-critical regime plays an essential role in activating a strong-pairing mechanism: although pairing bosons create a symmetry-breaking instability which suppresses pairing, the combination of these broken-symmetry states within the critical regime can restore this symmetry for the paired quasiparticles. This condition is shown to be met within a large-U ansatz. A hidden quantum phase transition then arises between a Fermi-liquid and a non-Fermi-liquid broken-symmetry striped state, and a critical regime in which the broken-symmetry states are combined.

Original languageEnglish (US)
Article number47011
JournalEPL
Volume98
Issue number4
DOIs
StatePublished - May 2012

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glues
cuprates
broken symmetry
activation
Group 5A compounds
chalcogenides
Fermi liquids
superconductivity
bosons
iron
physics
symmetry
liquids

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Pairing glue activation in cuprates within the quantum critical regime. / Ashkenazi, Josef; Johnson, Neil F.

In: EPL, Vol. 98, No. 4, 47011, 05.2012.

Research output: Contribution to journalArticle

Ashkenazi, Josef ; Johnson, Neil F. / Pairing glue activation in cuprates within the quantum critical regime. In: EPL. 2012 ; Vol. 98, No. 4.
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