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arXiv · 2405.03557

Description of two-dimensional altermagnetism: Categorization using spin group theory

Sike Zeng·Yu-Jun Zhao
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Abstract

Altermagnetism, recently spotlighted in condensed matter physics, presents captivating physical properties and holds promise for spintronics applications. This study delves into the theoretical description and categorization of two-dimensional altermagnetism using spin group theory. Employing spin-group formalism, we establish seven distinct spin layer groups, extending beyond the conventional five spin Laue groups, to describe two-dimensional altermagnetism. Utilizing these findings, we classify previously reported two-dimensional altermagnets and identify novel materials exhibiting altermagnetism. Specifically, monolayer MnTeMoO$_6$ and VP$_2$H$_8$(NO$_4$)$_2$ are predicted to be two-dimensional altermagnets. Furthermore, we scrutinize their spin-momentum locking characteristics through symmetry analysis and density functional theory calculations, substantiating their altermagnetic properties.

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Sike Zeng, Yu-Jun Zhao. 2024-05-06. Description of two-dimensional altermagnetism: Categorization using spin group theory. https://doi.org/10.1103/physrevb.110.054406

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