Altermagnets exhibit momentum-dependent spin splitting without net magnetization, combining characteristics of both ferromagnets and antiferromagnets, making them highly interesting for spintronics applications. CrSb is a prime candidate with a high N\'eel temperature (∼700~K) and a large exchange-driven splitting of ∼0.6--1~eV. Using ab-initio calculations, we consider slabs of various orientations in the ultrathin limit. We find that (100) oriented slabs have spin-degenerate bands. In (0001) oriented slabs, the exchange-driven altermagnetic spin splitting collapses, but including spin-orbit coupling restores a residual anisotropic splitting of ∼70~meV. In contrast, the (110) oriented slabs show an altermagnetic spin splitting of ∼400~meV, and emerges as a robust candidate for realizing large, exchange-driven altermagnetism
@article{arxiv.2510.00985,
title = {Altermagnetism of ultrathin CrSb slabs},
author = {Brahim Marfoua and Mohammad Amirabbasi and Marcus Ekholm},
journal= {arXiv preprint arXiv:2510.00985},
year = {2025}
}