Giant electrically tunable magnon transport anisotropy in a van der Waals antiferromagnetic insulator

Shaomian Qi, Di Chen, Kangyao Chen, Jianqiao Liu, Guangyi Chen, Bingcheng Luo, Hang Cui, Linhao Jia, Jiankun Li, Miaoling Huang, Yuanjun Song, Shiyi Han, Lianming Tong, Peng Yu, Yi Liu, Hongyu Wu, Shiwei Wu, Jiang Xiao, Ryuichi Shindou, X. C. Xie and Jian-Hao Chen ()
Additional contact information
Shaomian Qi: Peking University
Di Chen: Beijing Academy of Quantum Information Sciences
Kangyao Chen: Peking University
Jianqiao Liu: Peking University
Guangyi Chen: Peking University
Bingcheng Luo: Peking University
Hang Cui: Peking University
Linhao Jia: Peking University
Jiankun Li: Beijing Academy of Quantum Information Sciences
Miaoling Huang: Beijing Academy of Quantum Information Sciences
Yuanjun Song: Beijing Academy of Quantum Information Sciences
Shiyi Han: Peking University
Lianming Tong: Peking University
Peng Yu: Sun Yat-sen University
Yi Liu: Beijing Normal University
Hongyu Wu: Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences
Shiwei Wu: Fudan University
Jiang Xiao: Fudan University
Ryuichi Shindou: Peking University
X. C. Xie: Peking University
Jian-Hao Chen: Peking University

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Anisotropy is a manifestation of lowered symmetry in material systems that have profound fundamental and technological implications. For van der Waals magnets, the two-dimensional (2D) nature greatly enhances the effect of in-plane anisotropy. However, electrical manipulation of such anisotropy as well as demonstration of possible applications remains elusive. In particular, in-situ electrical modulation of anisotropy in spin transport, vital for spintronics applications, has yet to be achieved. Here, we realized giant electrically tunable anisotropy in the transport of second harmonic thermal magnons (SHM) in van der Waals anti-ferromagnetic insulator CrPS4 with the application of modest gate current. Theoretical modeling found that 2D anisotropic spin Seebeck effect is the key to the electrical tunability. Making use of such large and tunable anisotropy, we demonstrated multi-bit read-only memories (ROMs) where information is inscribed by the anisotropy of magnon transport in CrPS4. Our result unveils the potential of anisotropic van der Waals magnons for information storage and processing.

Date: 2023
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DOI: 10.1038/s41467-023-38172-7

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