First-principles calculations on candidate altermagnetic materials

Altermagnetism is an emerging field in which materials exhibit non-relativistic spin splitting reminiscent of ferromagnets, while their magnetic moments are ordered antiferromagnetically [1]. This phenomenon is a consequence of broken time-reversal symmetry and the separation between real-space and spin-space symmetry operations. Kagome systems display a range of intriguing properties, including charge density waves, superconductivity, strong correlation effects, and the recently proposed altermagnetism in CsCr₃Sb₅ [2]. We use density functional theory to explore non-relativistic spin-splitting in alternative kagome materials and determine the impact of electronic correlation on their magnetic or candidate altermagnetic states.

[1] L. Šmejkal, J. Sinova, and T. Jungwirth, Phys. Rev. X 12, 040501 (2022).

[2] C. Xu et al., Nature Commun. 16, 3114 (2025).