Triple-${\bf Q}$ collinear state with compensated ferrimagnetic nature on frustrated kagome lattice
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866911611505082368 |
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| author | Aoyama, Kazushi Kawamura, Hikaru |
| author_facet | Aoyama, Kazushi Kawamura, Hikaru |
| contents | Spin-selective band splitting without net magnetization and spin-orbit couplings serves for a next-generation spin-current generator, and its typical platforms are altermagnets and compensated ferrimagnets as well, where the existence of a crystal asymmetry or nonequivalent sites is essential. Here, we theoretically demonstrate that such a splitting can be realized in a triple-{\bf Q} 12-sublattice state emerging in a $J_3$-dominant kagome antiferromagnet, without the help of the crystal asymmetry. Reflecting the multi-sublattice nature, a local magnetization reveals a fully compensated ferrimagnetic pattern in units of a triangle plaquette, leading to $s$-wave-type spin splittings in magnon and electron bands. This enables an atiferromagnetic spin Seebeck effect at zero field in insulating systems and filling-controlled polarized states in metallic systems, highlighting the potential of frustrated magnets to realize novel spintronics functionalities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_19156 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Triple-${\bf Q}$ collinear state with compensated ferrimagnetic nature on frustrated kagome lattice Aoyama, Kazushi Kawamura, Hikaru Strongly Correlated Electrons Spin-selective band splitting without net magnetization and spin-orbit couplings serves for a next-generation spin-current generator, and its typical platforms are altermagnets and compensated ferrimagnets as well, where the existence of a crystal asymmetry or nonequivalent sites is essential. Here, we theoretically demonstrate that such a splitting can be realized in a triple-{\bf Q} 12-sublattice state emerging in a $J_3$-dominant kagome antiferromagnet, without the help of the crystal asymmetry. Reflecting the multi-sublattice nature, a local magnetization reveals a fully compensated ferrimagnetic pattern in units of a triangle plaquette, leading to $s$-wave-type spin splittings in magnon and electron bands. This enables an atiferromagnetic spin Seebeck effect at zero field in insulating systems and filling-controlled polarized states in metallic systems, highlighting the potential of frustrated magnets to realize novel spintronics functionalities. |
| title | Triple-${\bf Q}$ collinear state with compensated ferrimagnetic nature on frustrated kagome lattice |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2604.19156 |