We analyze the phase transition between a symmetric metallic parent state and itinerant altermagnetic order. The underlying mechanism we reveal in our microscopic model of electrons on a Lieb lattice does not involve orbital ordering, but derives from sublattice interference.
@article{arxiv.2412.14251,
title = {Altermagnetic phase transition in a Lieb metal},
author = {Matteo Dürrnagel and Hendrik Hohmann and Atanu Maity and Jannis Seufert and Michael Klett and Lennart Klebl and Ronny Thomale},
journal= {arXiv preprint arXiv:2412.14251},
year = {2026}
}