Consistent description of the metallic phase of overdoped cuprate superconductors as an anisotropic marginal Fermi liquid

TL;DR

This paper proposes a model self-energy combining isotropic Fermi liquid and anisotropic Marginal Fermi liquid components to explain various experimental observations in overdoped cuprate superconductors, unifying their doping-dependent and doping-independent behaviors.

Contribution

It introduces a self-energy model with anisotropic Marginal Fermi liquid behavior that aligns with multiple experimental results in overdoped cuprates, providing a unified theoretical framework.

Findings

Consistent description of ADMR, specific heat, and quantum oscillation data.

Reconciliation of doping-dependent scattering rates with doping-independent specific heat.

Validation of the model against photoemission measurements.

Abstract

We consider a model self-energy consisting of an isotropic Fermi liquid term and a Marginal Fermi liquid term which is anisotropic over the Fermi surface, vanishing in the same directions as the superconducting gap and the pseudogap. This model self-energy gives a consistent description of experimental results from Angle-Dependent Magneto-Resistance (ADMR), specific heat, de Haas-van Alphen, and measurements of the quasi-particle dispersion near the Fermi surface from photoemission. In particular, we reconcile the strongly doping dependent anomalous scattering rate observed in ADMR with the almost doping independent specific heat.