On the Origin of the Tunneling Asymmetry in the Cuprate Superconductors: a variational perspective

TL;DR

This paper uses variational Monte Carlo methods to analyze quasiparticle weights in cuprate superconductors, revealing particle-hole symmetry at low energies and proposing tunneling asymmetry as a probe for electron incoherence mechanisms.

Contribution

It introduces a variational approach to study tunneling asymmetry and quasiparticle weights, providing new insights into electron incoherence in high-temperature superconductors.

Findings

Quasiparticle weight is particle-hole symmetric at low energies.

Tunneling asymmetry can be used to study electron incoherence.

Variational Monte Carlo effectively captures quasiparticle properties.

Abstract

Through variational Monte Carlo calculation on Gutzwiller projected wave functions, we study the quasiparticle(qp) weight for adding and removing an electron from a high temperature superconductor. We find the qp weight is particle-hole symmetric at sufficiently low energy. We propose to use the tunneling asymmetry as a tool to study the mechanism of electron incoherence in high temperature superconductors.