High temperature superconductivity due to the long-range electron-phonon interaction, application to isotope effects, thermomagnetic transport and nanoscale heterogeneity in cuprates

TL;DR

This paper presents a model incorporating long-range electron-phonon interactions and strong correlations to explain high-temperature superconductivity phenomena in cuprates, including isotope effects and nanoscale heterogeneity.

Contribution

It introduces an extended Froehlich-Coulomb multi-polaron model that accounts for long-range interactions and strong correlations, advancing understanding of high-temperature superconductivity.

Findings

Explains isotope effects in cuprates.

Describes unconventional thermomagnetic transport.

Accounts for nanoscale heterogeneity and checkerboard modulations.

Abstract

Strong electron-phonon interactions in cuprates and other high-temperature superconductors have gathered support over the last decade in a large number of experiments. Here I briefly introduce the Froehlich-Coulomb multi-polaron model of high-temperature superconductivity, which includes strong on-site repulsive correlations and the long-range Coulomb and electron-phonon (e-ph) interactions. Our extension of the BCS theory to the strong-coupling regime with the long-range \emph{unscreened} electron-phonon interaction could naturally explain the isotope effects, unconventional thermomagnetic transport, and checkerboard modulations of the tunnelling density of states in cuprates.