On the Dichotomy between the Nodal and Antinodal Excitations in High-temperature Superconductors

TL;DR

This paper explains the observed dichotomy in electronic excitations in high-temperature superconductors by analyzing the coupling between quasiparticles and magnetic excitations, providing insights into their complex electronic behavior.

Contribution

It introduces a novel explanation for the nodal-antinodal dichotomy based on quasiparticle-magnetic excitation interactions in high-Tc superconductors.

Findings

Nodal and antinodal excitations show distinct behaviors.

Coupling with magnetic excitations accounts for the dichotomy.

Provides a theoretical framework for understanding electronic heterogeneity.

Abstract

Angle-resolved photoemission data on optimally- and under-doped high temperature superconductors reveal a dichotomy between the nodal and antinodal electronic excitations. In this paper we propose an explanation of this unusual phenomenon by employing the coupling between the quasiparticle and the commensurate/incommensurate magnetic excitations.