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arXiv · 2005.10452

Non-Hermitian coherent coupling of nanomagnets by exchange spin waves

Hanchen Wang·Jilei Chen·Tao Yu·Chuanpu Liu·Chenyang Guo·Hao Jia·Song Liu·Ka Shen·Tao Liu·Jianyu Zhang·Marco A. Cabero Z·Qiuming Song·Sa Tu·Mingzhong Wu·Xiufeng Han·Ke Xia·Dapeng Yu·Gerrit E. W. Bauer·Haiming Yu
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Abstract

Non-Hermitian physics has recently attracted much attention in optics and photonics. Less explored is non-Hermitian magnonics that provides opportunities to take advantage of the inevitable dissipation of magnons or spin waves in magnetic systems. Here we demonstrate non-Hermitian coherent coupling of two distant nanomagnets by fast spin waves with sub-50 nm wavelengths. Magnons in two nanomagnets are unidirectionally phase-locked with phase shifts controlled by magnon spin torque and spin-wave propagation. Our results are attractive for analog neuromorphic computing that requires unidirectional information transmission.

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Hanchen Wang, Jilei Chen, Tao Yu, Chuanpu Liu, Chenyang Guo, Hao Jia, Song Liu, Ka Shen, Tao Liu, Jianyu Zhang, Marco A. Cabero Z, Qiuming Song, Sa Tu, Mingzhong Wu, Xiufeng Han, Ke Xia, Dapeng Yu, Gerrit E. W. Bauer, Haiming Yu. 2020-05-21. Non-Hermitian coherent coupling of nanomagnets by exchange spin waves. https://doi.org/10.1007/s12274-020-3251-5

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