Unconventional proximity effects and pairing symmetries in cuprates caused by conventional phonons

TL;DR

This paper explains the unusual proximity effects and pairing symmetries in cuprate superconductors through strong electron-phonon interactions involving c-axis polarized optical phonons and anisotropic deformation potentials.

Contribution

It introduces a novel explanation for the unconventional properties of cuprates based on strong Froehlich interactions and anisotropic deformation potentials.

Findings

Giant and nil proximity effects explained by phonon interactions

Unconventional pairing symmetries linked to electron-phonon coupling

Strong Froehlich interaction as key mechanism

Abstract

Giant and nil proximity effects and unconventional symmetry of cuprate superconductors are explained as a result of the strong Froehlich interaction of holes with c-axis polarised optical phonons acting together with an anisotropic nonlocal deformation potential.