Enhanced pairing mechanism in Cuprate-type crystals

TL;DR

This paper proposes a new pairing mechanism in cuprate crystals driven by optical phonons and lattice distortions, leading to pair-density wave formation, demonstrated through numerical simulations on a copper-oxide lattice.

Contribution

It introduces a novel pairing mechanism involving phonons and Jahn-Teller distortions that facilitates PDW formation in cuprates, analyzed via a BCS mean-field approach.

Findings

Identification of an attractive pairing channel mediated by phonons and lattice distortions.

Numerical demonstration of pair-density wave formation in a copper-oxide lattice.

Insight into the interplay between lattice dynamics and superconductivity in cuprates.

Abstract

Using a BCS mean-field approach, we show how the interplay between low-momentum optical phonons and Jahn-Teller-type lattice distortions can open an attractive channel that allows the formation of pairs with the corresponding density exhibiting characteristic features of a pair-density wave (PDW). We demonstrate this numerically on a copper-oxide type lattice.