Search for the \pi Resonance in Two Particle Tunneling Experiments of YBCO Superconductors

TL;DR

This paper proposes an experiment to directly detect the c0 resonance, a predicted sharp spin triplet collective mode in YBCO superconductors, via two-particle tunneling measurements, testing recent theoretical predictions.

Contribution

It introduces a novel experimental approach to directly observe the c0 resonance in YBCO superconductors through two-particle tunneling.

Findings

Proposal of a tunneling experiment to detect the c0 resonance.

The c0 resonance is predicted to be a sharp collective mode in the normal state.

Potential validation of recent theoretical models of neutron scattering peaks.

Abstract

A recent theory of the resonant neutron scattering peaks in YBCO superconductors predicts the existence of a sharp spin triplet two particle collective mode (the ``\pi resonance") in the normal state. In this paper, we propose an experiment in which the \pi resonance could be probed directly in a two particle tunneling measurement.