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

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.

References in corpus (5)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Electrodynamics of Correlated Electron Materials
• Unified explanation of the Kadowaki-Woods ratio in strongly correlated materials
• Spin correlations in the electron-doped high-transition-temperature superconductor Nd{2-x}Ce{x}CuO{4+/-delta}
• Breakdown of Fermi liquid behavior at the (π,π)=2k_F spin-density wave quantum-critical point: the case of electron-doped cuprates

Cited by in corpus (4)

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• Spin Hall conductivity in the Kane-Mele-Hubbard model at finite temperature
• Real-frequency TPSC+DMFT investigation of the square-lattice Hubbard model