Three prerequisites for high-temperature superconductivity in t-PtBi$_2$
Abstract
Although the generic mechanism behind high-temperature superconductivity remains notoriously elusive, a set of favorable conditions for its occurrence in a given material has emerged: (i) the electronic structure should have a very high density of states near the Fermi level; (ii) electrons need to be susceptible to a sizable interaction with another degree of freedom to ensure pairing themselves; (iii) the ability to fine-tune some of the system properties significantly helps maximising the critical temperature. Here, by means of high-resolution ARPES, we show that all three criteria are remarkably fulfilled in trigonal platinum bismuthide (t-PtBi). Specifically, this happens on its surface, which hosts topological surface states known as Fermi arcs. Our findings pave the way for the stabilisation and optimisation of high-temperature superconductivity in this topological material.
Cite
@article{arxiv.2509.02178,
title = {Three prerequisites for high-temperature superconductivity in t-PtBi$_2$},
author = {Andrii Kuibarov and Susmita Changdar and Riccardo Vocaturo and Oleksandr Suvorov and Alexander Fedorov and Rui Lou and Maxim Krivenkov and Luminita Harnagea and Sabine Wurmehl and Jeroen van den Brink and Bernd Büchner and Sergey Borisenko},
journal= {arXiv preprint arXiv:2509.02178},
year = {2025}
}