Interplay of vibrational, electronic, and magnetic states in 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_ | 1866911420156739584 |
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| author | Markina, Daria I. Mondal, Priyanka Krelle, Lukas Shradha, Sai Glazov, Mikhail M. von Klitzing, Regine Mosina, Kseniia Sofer, Zdenek Urbaszek, Bernhard |
| author_facet | Markina, Daria I. Mondal, Priyanka Krelle, Lukas Shradha, Sai Glazov, Mikhail M. von Klitzing, Regine Mosina, Kseniia Sofer, Zdenek Urbaszek, Bernhard |
| contents | The van der Waals antiferromagnet CrSBr exhibits coupling of vibrational, electronic, and magnetic degrees of freedom, giving rise to distinctive quasi-particle interactions. We investigate these interactions across a wide temperature range using polarization-resolved Raman spectroscopy at various excitation energies, complemented by optical absorption and photoluminescence excitation (PLE) spectroscopy. Under 1.96 eV excitation, we observe pronounced changes in the A$_g^1$, A$_g^2$, and A$_g^3$ Raman modes near the Néel temperature, coinciding with modifications in the oscillator strength of excitonic transitions and clear resonances in PLE. The distinct temperature evolution of Raman tensor elements and polarization anisotropy for Raman modes indicates that they couple to different excitonic and electronic states. The suppression of the excitonic state's oscillation strength above the Néel temperature could be related to the magnetic phase transition, thereby connecting these excitonic states and Raman modes to a specific spin alignment. These observations make CrSBr a versatile platform for probing quasi-particle interactions in low-dimensional magnets and provide insights for applications in quantum sensing and quantum communication. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_10267 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Interplay of vibrational, electronic, and magnetic states in CrSBr Markina, Daria I. Mondal, Priyanka Krelle, Lukas Shradha, Sai Glazov, Mikhail M. von Klitzing, Regine Mosina, Kseniia Sofer, Zdenek Urbaszek, Bernhard Materials Science The van der Waals antiferromagnet CrSBr exhibits coupling of vibrational, electronic, and magnetic degrees of freedom, giving rise to distinctive quasi-particle interactions. We investigate these interactions across a wide temperature range using polarization-resolved Raman spectroscopy at various excitation energies, complemented by optical absorption and photoluminescence excitation (PLE) spectroscopy. Under 1.96 eV excitation, we observe pronounced changes in the A$_g^1$, A$_g^2$, and A$_g^3$ Raman modes near the Néel temperature, coinciding with modifications in the oscillator strength of excitonic transitions and clear resonances in PLE. The distinct temperature evolution of Raman tensor elements and polarization anisotropy for Raman modes indicates that they couple to different excitonic and electronic states. The suppression of the excitonic state's oscillation strength above the Néel temperature could be related to the magnetic phase transition, thereby connecting these excitonic states and Raman modes to a specific spin alignment. These observations make CrSBr a versatile platform for probing quasi-particle interactions in low-dimensional magnets and provide insights for applications in quantum sensing and quantum communication. |
| title | Interplay of vibrational, electronic, and magnetic states in CrSBr |
| topic | Materials Science |
| url | https://arxiv.org/abs/2509.10267 |