Magneto-Excitonic Duality From Monolayer to Trilayer CrSBr
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908878731476992 |
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| author | Antoniazzi, Igor Kipczak, Łucja Camargo, Bruno Gayatri Mohanty, Chinmay Mosina, Kseniia Sofer, Zdeněk Babiński, Adam Karmakar, Arka Molas, Maciej R. |
| author_facet | Antoniazzi, Igor Kipczak, Łucja Camargo, Bruno Gayatri Mohanty, Chinmay Mosina, Kseniia Sofer, Zdeněk Babiński, Adam Karmakar, Arka Molas, Maciej R. |
| contents | Two-dimensional (2D) layered magnetic materials (LMMs) are a newly emerging class of van der Waals materials, opening new opportunities to study magneto-excitonic coupling. The air-stable, structurally and optically anisotropic A-type antiferromagnetic chromium sulfur bromide (CrSBr) is one of the most prominent examples of such LMMs. We investigate photoluminescence (PL) and PL excitation of mono- to tri-layers CrSBr and find that it exhibits a unique duplexity, supporting both Frenkel- and Wannier-Mott-like excitons. Our magneto-optical experiments reveal a similar excitonic response from the mono- and trilayer systems and a completely different signature in the bilayer flake. This shows a different origin of the low-lying excitonic species (A, A', and B) in the band structure. We confirm the robustness of the magneto-excitonic coupling in few-layer CrSBr. Our work enables a more comprehensive exploration of the dual excitonic behavior in 2D materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_21611 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magneto-Excitonic Duality From Monolayer to Trilayer CrSBr Antoniazzi, Igor Kipczak, Łucja Camargo, Bruno Gayatri Mohanty, Chinmay Mosina, Kseniia Sofer, Zdeněk Babiński, Adam Karmakar, Arka Molas, Maciej R. Materials Science Two-dimensional (2D) layered magnetic materials (LMMs) are a newly emerging class of van der Waals materials, opening new opportunities to study magneto-excitonic coupling. The air-stable, structurally and optically anisotropic A-type antiferromagnetic chromium sulfur bromide (CrSBr) is one of the most prominent examples of such LMMs. We investigate photoluminescence (PL) and PL excitation of mono- to tri-layers CrSBr and find that it exhibits a unique duplexity, supporting both Frenkel- and Wannier-Mott-like excitons. Our magneto-optical experiments reveal a similar excitonic response from the mono- and trilayer systems and a completely different signature in the bilayer flake. This shows a different origin of the low-lying excitonic species (A, A', and B) in the band structure. We confirm the robustness of the magneto-excitonic coupling in few-layer CrSBr. Our work enables a more comprehensive exploration of the dual excitonic behavior in 2D materials. |
| title | Magneto-Excitonic Duality From Monolayer to Trilayer CrSBr |
| topic | Materials Science |
| url | https://arxiv.org/abs/2508.21611 |