Polarization of photoluminescence by optically driven orbital reconstruction in magnetically ordered CrCl3
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arXiv
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| Format: | Preprint |
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2025
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| author | Zhou, Lanqing Ležaić, Marjana Mokrousov, Yuriy Bui, Minh N. Rani, Renu Grützmacher, Detlev Kardynał, Beata E. |
| author_facet | Zhou, Lanqing Ležaić, Marjana Mokrousov, Yuriy Bui, Minh N. Rani, Renu Grützmacher, Detlev Kardynał, Beata E. |
| contents | In this paper, we show that photoluminescence from CrCl3 bulk crystal exhibits a preferential polarization direction when films are magnetically ordered or strained. We verify the magnetization as responsible for the polarization by measuring the signal as a function of the temperature in Voigt configuration while applying the in-plane magnetic field. We show that phonon coupling contributing to vibronic transitions depolarizes the signal compared with zero phonon lines. We explain the data using DFT calculations, which reveal a magnetization-selective occupation of the low energy d-orbital triplet state of Cr3+ upon photon absorption. In addition, the calculations find that the excitation of one electron results in the excited state acquiring out-of-plane components of spin and very large orbital magnetic moments, in addition to a lattice deformation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_16285 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Polarization of photoluminescence by optically driven orbital reconstruction in magnetically ordered CrCl3 Zhou, Lanqing Ležaić, Marjana Mokrousov, Yuriy Bui, Minh N. Rani, Renu Grützmacher, Detlev Kardynał, Beata E. Materials Science Optics In this paper, we show that photoluminescence from CrCl3 bulk crystal exhibits a preferential polarization direction when films are magnetically ordered or strained. We verify the magnetization as responsible for the polarization by measuring the signal as a function of the temperature in Voigt configuration while applying the in-plane magnetic field. We show that phonon coupling contributing to vibronic transitions depolarizes the signal compared with zero phonon lines. We explain the data using DFT calculations, which reveal a magnetization-selective occupation of the low energy d-orbital triplet state of Cr3+ upon photon absorption. In addition, the calculations find that the excitation of one electron results in the excited state acquiring out-of-plane components of spin and very large orbital magnetic moments, in addition to a lattice deformation. |
| title | Polarization of photoluminescence by optically driven orbital reconstruction in magnetically ordered CrCl3 |
| topic | Materials Science Optics |
| url | https://arxiv.org/abs/2502.16285 |