Electrically switchable van der Waals magnon valves

Guangyi Chen, Shaomian Qi, Jianqiao Liu, Di Chen, Jiongjie Wang, Shili Yan, Yu Zhang, Shimin Cao, Ming Lu, Shibing Tian, Kangyao Chen, Peng Yu, Zheng Liu, X. C. Xie, Jiang Xiao, Ryuichi Shindou and Jian-Hao Chen ()
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Guangyi Chen: Peking University
Shaomian Qi: Peking University
Jianqiao Liu: Peking University
Di Chen: Peking University
Jiongjie Wang: Fudan University
Shili Yan: Beijing Academy of Quantum Information Sciences
Yu Zhang: Beijing Academy of Quantum Information Sciences
Shimin Cao: Peking University
Ming Lu: Peking University
Shibing Tian: Chinese Academy of Sciences
Kangyao Chen: Peking University
Peng Yu: Sun Yat-sen University
Zheng Liu: Nanyang Technological University
X. C. Xie: Peking University
Jiang Xiao: Fudan University
Ryuichi Shindou: Peking University
Jian-Hao Chen: Peking University

Nature Communications, 2021, vol. 12, issue 1, 1-5

Abstract: Abstract Van der Waals magnets have emerged as a fertile ground for the exploration of highly tunable spin physics and spin-related technology. Two-dimensional (2D) magnons in van der Waals magnets are collective excitation of spins under strong confinement. Although considerable progress has been made in understanding 2D magnons, a crucial magnon device called the van der Waals magnon valve, in which the magnon signal can be completely and repeatedly turned on and off electrically, has yet to be realized. Here we demonstrate such magnon valves based on van der Waals antiferromagnetic insulator MnPS3. By applying DC electric current through the gate electrode, we show that the second harmonic thermal magnon (SHM) signal can be tuned from positive to negative. The guaranteed zero crossing during this tuning demonstrates a complete blocking of SHM transmission, arising from the nonlinear gate dependence of the non-equilibrium magnon density in the 2D spin channel. Using the switchable magnon valves we demonstrate a magnon-based inverter. These results illustrate the potential of van der Waals anti-ferromagnets for studying highly tunable spin-wave physics and for application in magnon-base circuitry in future information technology.

Date: 2021
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DOI: 10.1038/s41467-021-26523-1

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