Superconductivity from charge order in cuprates

TL;DR

This paper reviews how charge stripe order in cuprates interacts with superconductivity, highlighting evidence for coexistence and proposing a new pairing mechanism within charge stripes that advances understanding of high-temperature superconductivity.

Contribution

It synthesizes recent findings on charge stripes and superconductivity in cuprates, proposing a novel pairing mechanism based on charge stripe regions.

Findings

Charge stripes often coexist with two-dimensional superconductivity.

Charge-stripe order generally competes with bulk superconductivity.

A new pairing mechanism within charge stripes is proposed.

Abstract

Superconductivity in layered cuprates is induced by doping holes into a parent antiferromagnetic insulator. It is now recognized that another common emergent order involves charge stripes, and our understanding of the relationship between charge stripes and superconductivity has been evolving. Here we review studies of 214 cuprate families obtained by doping La$_2$CuO$_4$. Charge-stripe order tends to compete with bulk superconductivity; nevertheless, there is plentiful evidence that it coexists with two-dimensional superconductivity. This has been interpreted in terms of pair-density-wave superconductivity, and the perspective has shifted from competing to intertwined orders. In fact, a new picture of superconductivity based on pairing within charge stripes has been proposed, as we discuss.