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arXiv:2510.07996 (cond-mat)
[Submitted on 9 Oct 2025 (v1), last revised 20 Jul 2026 (this version, v4)]

Title:Evidence for Magnon-Assisted Exciton Radiation in a Layered Antiferromagnetic Semiconductor

Authors:Yingchen Peng, Yanan Ge, Wentao Chen, Zihan Wang, Kang Wang, Kezhao Du, Xingzhi Wang, Ye Yang
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Abstract: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 antiferromagnet MnPS3, uncovering an exceptionally long exciton lifetime (~100 {\mu}s) below the Néel temperature (T_N). We demonstrate that the exciton lifetime is governed by phonon-assisted nonradiative recombination and thus exhibits a strong temperature dependence. In contrast, the exciton radiative recombination shows a distinct temperature dependence that is sensitive to magnetic order. Below T_N, the temperature dependence of the radiative recombination rate is consistent with a magnon-assisted emission pathway, while above T_N it reflects the combined effects of short-range spin correlations and phonons. 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.
Subjects: Materials Science (cond-mat.mtrl-sci)
Cite as: arXiv:2510.07996 [cond-mat.mtrl-sci]
  (or arXiv:2510.07996v4 [cond-mat.mtrl-sci] for this version)
  https://doi.org/10.48550/arXiv.2510.07996

Submission history

From: Ye Yang [view email]
[v1] Thu, 9 Oct 2025 09:32:54 UTC (1,690 KB)
[v2] Sat, 11 Oct 2025 04:56:13 UTC (1,800 KB)
[v3] Sat, 25 Apr 2026 09:05:36 UTC (1,999 KB)
[v4] Mon, 20 Jul 2026 07:09:33 UTC (2,018 KB)
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