Magnon-mediated Radiation and Phonon-driven Quenching of Excitons in a Layered Semiconductor
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866908992398163968 |
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| author | Peng, Yingchen Ge, Yanan Wang, Zihan Wang, Kang Du, Kezhao Wang, Xingzhi Yang, Ye |
| author_facet | Peng, Yingchen Ge, Yanan Wang, Zihan Wang, Kang Du, Kezhao Wang, Xingzhi Yang, Ye |
| contents | Layered van der Waals (vdW) magnetic semiconductors open a new avenue for exploring intertwined excitonic and magnetic phenomena. Here, we investigate this interplay in the vdW MnPS3 antiferromagnet, uncovering an exceptionally long exciton lifetime (~100 μs) below the Néel temperature (T_N). We demonstrate that the exciton lifetime is governed by phonon-mediated nonradiative recombination and thus exhibits a strong temperature dependence. On the contrary, the radiative recombination rate shows a distinct temperature dependence, which is dominated by magnon-assisted emission mechanism below T_N and by short-range spin correlations and phonons above T_N. These findings not only establish MnPS3 as a compelling candidate for excitonic devices due to its long-lifetime and correlation with magnetic orders but also provide crucial insights into the interplay between excitons, spins, and lattice in vdW magnetic semiconductors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_07996 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnon-mediated Radiation and Phonon-driven Quenching of Excitons in a Layered Semiconductor Peng, Yingchen Ge, Yanan Wang, Zihan Wang, Kang Du, Kezhao Wang, Xingzhi Yang, Ye Materials Science Layered van der Waals (vdW) magnetic semiconductors open a new avenue for exploring intertwined excitonic and magnetic phenomena. Here, we investigate this interplay in the vdW MnPS3 antiferromagnet, uncovering an exceptionally long exciton lifetime (~100 μs) below the Néel temperature (T_N). We demonstrate that the exciton lifetime is governed by phonon-mediated nonradiative recombination and thus exhibits a strong temperature dependence. On the contrary, the radiative recombination rate shows a distinct temperature dependence, which is dominated by magnon-assisted emission mechanism below T_N and by short-range spin correlations and phonons above T_N. These findings not only establish MnPS3 as a compelling candidate for excitonic devices due to its long-lifetime and correlation with magnetic orders but also provide crucial insights into the interplay between excitons, spins, and lattice in vdW magnetic semiconductors. |
| title | Magnon-mediated Radiation and Phonon-driven Quenching of Excitons in a Layered Semiconductor |
| topic | Materials Science |
| url | https://arxiv.org/abs/2510.07996 |