What is the highest Tc for phonon mediated superconductivity?

TL;DR

This paper proposes that non-s-wave symmetry superconductors, influenced by van Hove singularities, could achieve the highest critical temperatures through phonon-mediated mechanisms, challenging traditional views on pairing symmetry.

Contribution

It introduces the idea that non-s-wave pairing symmetries may lead to higher Tc in phonon-mediated superconductors, emphasizing the role of van Hove singularities.

Findings

Non-s-wave symmetry predicted to have highest Tc

Discussion of Fermi arc, d-wave symmetry, and poor conduction

Critical temperature and pairing temperature difference analyzed

Abstract

We suggest that the high-temperature superconductivity is attributed to the director-roles of van Hove singularity between electron-electron interaction and electron-phonon interaction. Difference between the critical temperature and pairing temperature is presented, and the Fermi arc, d-wave symmetry and poor conductor etc are discussed. Particularly, non-s-wave symmetry is predicted to have the highest Tc for superconductors.