Colour symmetry and altermagnetic-like spin textures in noncollinear antiferromagnets
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909653399502848 |
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| author | Radaelli, Paolo G. Gurung, Gautam |
| author_facet | Radaelli, Paolo G. Gurung, Gautam |
| contents | We present a formalism based on colour symmetry to analyse the momentum-space spin textures of non-collinear antiferromagnets. We show that, out of the spin textures allowed by the magnetic point group, \textcolor{\altcolor} {one can extract a component that is invariant by general rotations in spin space, and can exist in the absence of spin-orbit coupling, in complete analogy to spin textures in altermagnets}. We demonstrate this approach in the case of three complex, non-collinear magnets, Mn$_3$Ir(Ge,Si), Pb$_2$MnO$_4$ and Mn$_3$GaN. For Mn$_3$GaN, we also show that the predictions of colour-symmetry analysis are consistent with density functional theory calculations performed on the same system both with and without spin-orbit coupling. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_02947 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Colour symmetry and altermagnetic-like spin textures in noncollinear antiferromagnets Radaelli, Paolo G. Gurung, Gautam Strongly Correlated Electrons We present a formalism based on colour symmetry to analyse the momentum-space spin textures of non-collinear antiferromagnets. We show that, out of the spin textures allowed by the magnetic point group, \textcolor{\altcolor} {one can extract a component that is invariant by general rotations in spin space, and can exist in the absence of spin-orbit coupling, in complete analogy to spin textures in altermagnets}. We demonstrate this approach in the case of three complex, non-collinear magnets, Mn$_3$Ir(Ge,Si), Pb$_2$MnO$_4$ and Mn$_3$GaN. For Mn$_3$GaN, we also show that the predictions of colour-symmetry analysis are consistent with density functional theory calculations performed on the same system both with and without spin-orbit coupling. |
| title | Colour symmetry and altermagnetic-like spin textures in noncollinear antiferromagnets |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2501.02947 |