Enhancing superconductivity with resonant anti-shielding and topological plasmon-polarons
Abstract
By employing ab initio Migdal-Eliashberg calculations, we predict a 4-fold enhancement of the superconducting critical temperature of MgB when proximity-coupled to the topological crystal BiSe. We support this result with calculations using the general Leavens scaling method. We show that this effect is a result of dynamic resonant anti-shielding of Cooper pairs by plasmon polarons of Dirac electrons in the topological crystal. Our calculations show that such superconductivity enhancement varies strongly with Coulomb coupling between plasmon polarons and Cooper pairs, with a pronounced maximum of at a critical value of the coupling parameter. This feature is universal, and so can occur in other superconductor-topological crystal combinations, including with non-phonon mediated superconductors. We discuss methods to experimentally optimize the key coupling parameter.
Keywords
Cite
@article{arxiv.2109.10247,
title = {Enhancing superconductivity with resonant anti-shielding and topological plasmon-polarons},
author = {Krzysztof Kempa and Nakib H. Protik and Tyler Dodge and Claudia Draxl and Michael J. Naughton},
journal= {arXiv preprint arXiv:2109.10247},
year = {2023}
}