Hole Superconductivity in MgB_2, Cuprates, and Other Materials

TL;DR

This paper discusses a unified theory of superconductivity driven by hole undressing, challenging the electron-phonon interaction model, and applies it to MgB_2, cuprates, and other superconductors.

Contribution

It introduces and reviews the hole superconductivity theory as a common mechanism for various superconductors, contrasting with traditional electron-phonon explanations.

Findings

Hole undressing is proposed as the universal mechanism for superconductivity.

Evidence supporting hole undressing in MgB_2 and cuprates is summarized.

Predictions for MgB_2 based on the theory are discussed.

Abstract

The theory of hole superconductivity proposes that MgB_2, and the high Tc cuprates, and the 'conventional superconductors', and all other superconductors, are driven by the same physical mechanism, which is not the electron-phonon interaction. That mechanism, hole undressing, evidence supporting it, and predictions for MgB_2, are briefly reviewed.