Within the family of altermagnets, CrSb is a metallic, collinearly ordered material that exhibits particularly strong symmetry-induced spin splitting in its band structure. In this study, we combine electrical magnetotransport measurements up to 68 T on microfabricated single-crystalline CrSb with first-principles calculations to investigate its Fermi surface. Notably, we study the temperature and field-orientation dependence of magnetic quantum oscillations observed in the magnetoresistance. The observed frequency spectrum agrees well with results from density-functional-theory calculations. Our results confirm the predicted electronic band structure of altermagnetic CrSb and highlight the importance of high magnetic fields for accurately mapping the Fermi surfaces of unconventional emergent materials.
@article{arxiv.2602.24033,
title = {Fermi-surface studies of altermagnetic CrSb from Shubnikov-de Haas oscillations},
author = {Sajal Naduvile Thadathil and Beat Valentin Schwarze and Jaafar Ansari and Tommy Kotte and Sven Luther and Marc Uhlarz and Rafael Gonzalez-Hernandez and Libor Šmejkal and Thanassis Speliotis and Markéta Žáčková and Jiří Pospíšil and Christoph Müller and Dominik Kriegner and Helena Reichlová and Joachim Wosnitza and Toni Helm},
journal= {arXiv preprint arXiv:2602.24033},
year = {2026}
}