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Two-Dimensional Altermagnetism in Epitaxial CrSb Ultrathin Films
Keren Li, Yuzhong Hu, Yue Li, Ruohang Xu, Heping Li, Kun Liu, Chen Liu, Jincheng Zhuang, Yee Sin Ang, Jiaou Wang, Haifeng Feng, Weichang Hao, Yi Du
https://arxiv.org/abs/2510.12344

Two-Dimensional Altermagnetism in Epitaxial CrSb Ultrathin Films
Altermagnets constitute an emerging class of collinear magnets that exhibit zero net magnetization yet host spin-split electronic bands arising from non-relativistic spin-space-group symmetries. Realization of altermagnetism in the two-dimensional (2D) limit remains an outstanding challenge because dimensional reduction suppresses kZ dispersion and destabilizes the symmetry operations essential for spin compensation. Here, we demonstrate genuine 2D altermagnetism in epitaxial unit-cell-thin fil…