Pairing glue activation in cuprates within the quantum critical regime

Josef Ashkenazi, Neil F. Johnson

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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 1 2012

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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