Zoology of Altermagnetic-type Non-collinear Magnets on the Maple Leaf Lattice
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arXiv
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| Format: | Preprint |
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2026
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| author | Ghosh, Pratyay Thomale, Ronny |
| author_facet | Ghosh, Pratyay Thomale, Ronny |
| contents | We define unconventional non-collinear magnetic ground states on the maple leaf lattice (MLL) distinguished by the selective breaking or preservation of time reversal ($\mathcal{T}$) and parity ($\mathcal{P}$). Depending on the nature of $\mathcal{P}\mathcal{T}$-breaking, linear spin-wave theory reveals momentum-dependent non-relativistic magnon spin splitting at different high symmetry points in the Brillouin zone. From a mean-field analysis of the Hubbard model at weak coupling, we reveal itinerant $\mathcal{P}$-preserving $q=0$ altermagnetic (A$l$M)-type order, while we expect $\mathcal{P}$-broken canted-$120^\circ$ A$l$M-type order at strong coupling. Our findings establish the MLL as a prime platform for exploring phase transitions and frustration phenomena emanating from competing non-collinear A$l$M-type orders. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_16807 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Zoology of Altermagnetic-type Non-collinear Magnets on the Maple Leaf Lattice Ghosh, Pratyay Thomale, Ronny Strongly Correlated Electrons We define unconventional non-collinear magnetic ground states on the maple leaf lattice (MLL) distinguished by the selective breaking or preservation of time reversal ($\mathcal{T}$) and parity ($\mathcal{P}$). Depending on the nature of $\mathcal{P}\mathcal{T}$-breaking, linear spin-wave theory reveals momentum-dependent non-relativistic magnon spin splitting at different high symmetry points in the Brillouin zone. From a mean-field analysis of the Hubbard model at weak coupling, we reveal itinerant $\mathcal{P}$-preserving $q=0$ altermagnetic (A$l$M)-type order, while we expect $\mathcal{P}$-broken canted-$120^\circ$ A$l$M-type order at strong coupling. Our findings establish the MLL as a prime platform for exploring phase transitions and frustration phenomena emanating from competing non-collinear A$l$M-type orders. |
| title | Zoology of Altermagnetic-type Non-collinear Magnets on the Maple Leaf Lattice |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2601.16807 |