Thermal magnon transport in van der Waals antiferromagnetic CrPS4

Junjiang Tian; Chuanshou Wang; Lifan Zhou; Yinxin Bai; Yihao Yang; Yunlin Lei; Lang Chen; Changjian Li; Junling Wang

doi:10.1063/5.0286285

Thermal magnon transport in van der Waals antiferromagnetic CrPS₄

Junjiang Tian (Co-first Author), Chuanshou Wang (Co-first Author), Lifan Zhou, Yinxin Bai, Yihao Yang, Yunlin Lei, Lang Chen, Changjian Li, Junling Wang^*

^*Corresponding author for this work

Department of Physics

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

1 Citation (Scopus)

Abstract

Magnons in insulating antiferromagnets hold great promise for low-dissipation spintronics, also known as magnonics. Yet, the understanding of their generation and transport behaviors in the emerging two-dimensional (2D) van der Waals (vdW) systems remains limited. Here, we report the systematic study on the thermal magnon transport in the A-type vdW antiferromagnet CrPS₄ using the nonlocal detection method. We demonstrate a magnon propagation length of 6.8 μm in 50-nm-thick samples at 2 K, exceeding most previously reported values in antiferromagnets. Temperature-dependent studies reveal a threefold reduction in magnon diffusion length from 6.8 μm (2 K) to 1.6 μm (20 K) at elevated temperature, which is attributed to enhanced magnon-phonon scattering. Thickness-dependent measurements reveal a monotonically increasing diffusion length as film thickness increases, which suggests that surface scattering may significantly suppress magnon propagation in thin samples. These observations improve our understanding of magnon transport in vdW antiferromagnets and establish CrPS₄ as a promising platform for future magnonics. © 2025 Author(s).

Original language	English
Article number	062406
Number of pages	5
Journal	Applied Physics Letters
Volume	127
Issue number	6
Online published	13 Aug 2025
DOIs	https://doi.org/10.1063/5.0286285
Publication status	Published - Aug 2025

Funding

We acknowledge the support of the Guangdong Innovative and Entrepreneurial ResearchTeam Program (Grant No. 2021ZT09C296), National Key R&D Program of China (No. 2022YFA1402903) and the start-up grant from the City University of Hong Kong, the National Natural Science Foundation of China (No. 52172115), the Shenzhen Science and Technology Program (No. 20231121093057002), the Shenzhen Science and Technology Program (No. RCBS20210706092215023), and the Young Scientists Fund of the National Natural Science Foundation of China (No. 52302143).

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Junjiang Tian, Chuanshou Wang, Lifan Zhou, Yinxin Bai, Yihao Yang, Yunlin Lei, Lang Chen, Changjian Li, Junling Wang; Thermal magnon transport in van der Waals antiferromagnetic CrPS4. Appl. Phys. Lett. 11 August 2025; 127 (6): 062406 and may be found at https://doi.org/10.1063/5.0286285.

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title = "Thermal magnon transport in van der Waals antiferromagnetic CrPS4",

abstract = "Magnons in insulating antiferromagnets hold great promise for low-dissipation spintronics, also known as magnonics. Yet, the understanding of their generation and transport behaviors in the emerging two-dimensional (2D) van der Waals (vdW) systems remains limited. Here, we report the systematic study on the thermal magnon transport in the A-type vdW antiferromagnet CrPS4 using the nonlocal detection method. We demonstrate a magnon propagation length of 6.8 μm in 50-nm-thick samples at 2 K, exceeding most previously reported values in antiferromagnets. Temperature-dependent studies reveal a threefold reduction in magnon diffusion length from 6.8 μm (2 K) to 1.6 μm (20 K) at elevated temperature, which is attributed to enhanced magnon-phonon scattering. Thickness-dependent measurements reveal a monotonically increasing diffusion length as film thickness increases, which suggests that surface scattering may significantly suppress magnon propagation in thin samples. These observations improve our understanding of magnon transport in vdW antiferromagnets and establish CrPS4 as a promising platform for future magnonics. {\textcopyright} 2025 Author(s).",

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T1 - Thermal magnon transport in van der Waals antiferromagnetic CrPS4

AU - Tian, Junjiang

AU - Wang, Chuanshou

AU - Zhou, Lifan

AU - Bai, Yinxin

AU - Yang, Yihao

AU - Lei, Yunlin

AU - Chen, Lang

AU - Li, Changjian

AU - Wang, Junling

PY - 2025/8

Y1 - 2025/8

N2 - Magnons in insulating antiferromagnets hold great promise for low-dissipation spintronics, also known as magnonics. Yet, the understanding of their generation and transport behaviors in the emerging two-dimensional (2D) van der Waals (vdW) systems remains limited. Here, we report the systematic study on the thermal magnon transport in the A-type vdW antiferromagnet CrPS4 using the nonlocal detection method. We demonstrate a magnon propagation length of 6.8 μm in 50-nm-thick samples at 2 K, exceeding most previously reported values in antiferromagnets. Temperature-dependent studies reveal a threefold reduction in magnon diffusion length from 6.8 μm (2 K) to 1.6 μm (20 K) at elevated temperature, which is attributed to enhanced magnon-phonon scattering. Thickness-dependent measurements reveal a monotonically increasing diffusion length as film thickness increases, which suggests that surface scattering may significantly suppress magnon propagation in thin samples. These observations improve our understanding of magnon transport in vdW antiferromagnets and establish CrPS4 as a promising platform for future magnonics. © 2025 Author(s).

AB - Magnons in insulating antiferromagnets hold great promise for low-dissipation spintronics, also known as magnonics. Yet, the understanding of their generation and transport behaviors in the emerging two-dimensional (2D) van der Waals (vdW) systems remains limited. Here, we report the systematic study on the thermal magnon transport in the A-type vdW antiferromagnet CrPS4 using the nonlocal detection method. We demonstrate a magnon propagation length of 6.8 μm in 50-nm-thick samples at 2 K, exceeding most previously reported values in antiferromagnets. Temperature-dependent studies reveal a threefold reduction in magnon diffusion length from 6.8 μm (2 K) to 1.6 μm (20 K) at elevated temperature, which is attributed to enhanced magnon-phonon scattering. Thickness-dependent measurements reveal a monotonically increasing diffusion length as film thickness increases, which suggests that surface scattering may significantly suppress magnon propagation in thin samples. These observations improve our understanding of magnon transport in vdW antiferromagnets and establish CrPS4 as a promising platform for future magnonics. © 2025 Author(s).

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