Néel vector controlled exceptional contours in $p$-wave magnet-ferromagnet junctions
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866908630708649984 |
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| author | Reja, Md Afsar Narayan, Awadhesh |
| author_facet | Reja, Md Afsar Narayan, Awadhesh |
| contents | Non-Hermitian systems can host exceptional degeneracies where not only the eigenvalues, but also the corresponding eigenvectors coalesce. Recently, $p$-wave magnets have been introduced, which are characterized by their unusual odd parity. In this work, we propose the emergence of non-Hermitian degeneracies at the interface of $p$-wave magnets and ferromagnets. We demonstrate that this setup offers a remarkable tunability allowing realization of exceptional lines and rings, which can be controlled via the orientation of the $p$-wave Néel vector. We present the origin of these exceptional contours based on symmetry, and characterize them using phase rigidity. Our works puts forward a versatile platform to realize controllable non-Hermitian degeneracies at odd parity magnetic interfaces. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_12434 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Néel vector controlled exceptional contours in $p$-wave magnet-ferromagnet junctions Reja, Md Afsar Narayan, Awadhesh Mesoscale and Nanoscale Physics Non-Hermitian systems can host exceptional degeneracies where not only the eigenvalues, but also the corresponding eigenvectors coalesce. Recently, $p$-wave magnets have been introduced, which are characterized by their unusual odd parity. In this work, we propose the emergence of non-Hermitian degeneracies at the interface of $p$-wave magnets and ferromagnets. We demonstrate that this setup offers a remarkable tunability allowing realization of exceptional lines and rings, which can be controlled via the orientation of the $p$-wave Néel vector. We present the origin of these exceptional contours based on symmetry, and characterize them using phase rigidity. Our works puts forward a versatile platform to realize controllable non-Hermitian degeneracies at odd parity magnetic interfaces. |
| title | Néel vector controlled exceptional contours in $p$-wave magnet-ferromagnet junctions |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2506.12434 |