ARPES, Neutrons, and the High-$T_c$ Mechanism

TL;DR

This paper demonstrates that ARPES and neutron scattering data on cuprate superconductors can be explained by a weak-coupling model with near-neighbour Heisenberg interactions, shedding light on the high-$T_c$ mechanism.

Contribution

It shows that both ARPES and neutron scattering results in Bi2212 are consistent with a dominant near-neighbour Heisenberg interaction, suggesting a specific magnetic interaction role in high-$T_c$ superconductivity.

Findings

ARPES and neutron data align with a weak-coupling model.

Near-neighbour Heisenberg interactions dominate in Bi2212.

Implications for the high-$T_c$ mechanism are discussed.

Abstract

Extensive ARPES and low-energy inelastic neutron scattering studies of cuprate superconductors can be successfully described using a weak-coupling theory in which quasiparticles on a square lattice interact via scalar and spin-dependent effective interactions. In this article we point out that in Bi$_2$Sr$_2$Ca$_{1-x}$Y$_x$Cu$_2$O$_8$ (Bi2212) both probes are consistent with dominant near-neighbour Heisenberg interactions. We discuss the implications of this finding for the mechanism of high-$T_c$ superconductivity.