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arXiv · 2111.08059

Resilient Fermi liquid and strength of correlations near an antiferromagnetic quantum critical point

C. Gauvin-Ndiaye·M. Setrakian·A. -M. S. Tremblay
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Abstract

Near the antiferromagnetic quantum critical point (QCP) of electron-doped cuprate superconductors, angle-resolved photoemission experiments detect hot spots where the Fermi surface disappears. Here we demonstrate, using the two-particle self-consistent theory, that in the antinodal region the Fermi liquid remains stable for a broad range of angles on the Fermi surface and for all dopings near the QCP. We show how the quasiparticle weight Z and effective mass m* change and then abruptly become meaningless as the hot spots are approached. We propose a dimensionless number, easily accessible in ARPES experiments, that can be used to gauge the strength of correlations.

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C. Gauvin-Ndiaye, M. Setrakian, A. -M. S. Tremblay. 2021-11-15. Resilient Fermi liquid and strength of correlations near an antiferromagnetic quantum critical point. https://doi.org/10.1103/physrevlett.128.087001

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