Pairing Glue Activation in Cuprates within the Quantum Critical Regime
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.
Keywords
Cite
@article{arxiv.1111.5033,
title = {Pairing Glue Activation in Cuprates within the Quantum Critical Regime},
author = {Josef Ashkenazi and Neil F. Johnson},
journal= {arXiv preprint arXiv:1111.5033},
year = {2012}
}
Comments
4 pages, 3 figures; modified version, including clarifications, accepted for publication in EPL