On kinetic energy stabilized superconductivity in cuprates

TL;DR

This paper critically examines the idea of kinetic energy-driven superconductivity in cuprates within the $tJ$ model, arguing that such a description violates fundamental physical principles and is therefore flawed.

Contribution

It challenges recent claims of kinetic energy stabilization of superconductivity in cuprates by highlighting violations of the virial theorem within the $tJ$ model.

Findings

The $tJ$ model's description of superconductivity violates the virial theorem.

Kinetic energy-driven superconductivity in cuprates is likely an artifact of the model.

The paper calls into question the validity of the $tJ$ model for this phenomenon.

Abstract

The possibility of kinetic energy driven superconductivity in cuprates as was recently found in the $tJ$ model is discussed. We argue that the violation of the virial theorem implied by this result is serious and means that the description of superconductivity within the $tJ$ model is pathological.