The interplay between electron-electron correlations and disorder has been a central theme of condensed matter physics over the last several decades, with particular interest in the possibility that interactions might cause delocalization of an Anderson insulator into a metallic state, and the disrupting effects of randomness on magnetic order and the Mott phase. Here we extend this physics to explore electron-phonon interactions and show, via exact quantum Monte Carlo simulations, that the suppression of the charge density wave correlations in the half-filled Holstein model by disorder can stabilize a superconducting phase. Our simulations thus capture qualitatively the suppression of charge ordered phases and emergent superconductivity recently seen experimentally.
@article{arxiv.1910.08703,
title = {Charge Density Wave and Superconductivity in the Disordered Holstein Model},
author = {Bo Xiao and Natanael C. Costa and Ehsan Khatami and George G. Batrouni and Richard T. Scalettar},
journal= {arXiv preprint arXiv:1910.08703},
year = {2021}
}