Probing multipolar order in the candidate altermagnet MnF$_2$ through the elastocaloric effect under strain
Strongly Correlated Electrons
2026-01-28 v1 Materials Science
Abstract
Altermagnets break a combination of time-reversal and rotational symmetries without generating a net magnetization. As such, the order parameter of -wave altermagnets has the same symmetry as magnetic multipoles, and couples to the product of a magnetic field and uniaxial strain. We combine elastocaloric experiments, free-energy modeling, and first-principles calculations on MnF to establish a thermodynamic probe of the predicted finite-temperature altermagnetic critical point. These results pave the way to explore altermagnetic quantum criticality in -wave materials and beyond.
Cite
@article{arxiv.2601.19343,
title = {Probing multipolar order in the candidate altermagnet MnF$_2$ through the elastocaloric effect under strain},
author = {Rahel Ohlendorf and Luca Buiarelli and Hilary M. L. Noad and Andrew P. Mackenzie and Rafael M. Fernandes and Turan Birol and Jörg Schmalian and Elena Gati},
journal= {arXiv preprint arXiv:2601.19343},
year = {2026}
}
Comments
7 pages, 4 figures + End Matter + Supplementary Information