We present the first finite-temperature study of a strongly correlated d-wave altermagnet across the Mott insulator-metal transition using a non-perturbative numerical approach. We map out the thermal phase diagram and provide quantitative estimates of the transition scales in an interacting altermagnet. We show that altermagnetism-induced geometric frustration stabilizes a finite-temperature correlated magnetic metal and enhances the magnetic transition scale across regimes of interaction. These results establish the finite-temperature landscape of correlated altermagnets and clarify the role of strong electronic interactions in this phase.
@article{arxiv.2603.02707,
title = {Metal-insulator transition and thermal scales in $d$-wave altermagnet},
author = {Santhosh Kannan and Jainam Savla and Madhuparna Karmakar},
journal= {arXiv preprint arXiv:2603.02707},
year = {2026}
}