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Ultra-large mutually synchronized networks of 10 nm spin Hall nano-oscillators
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Ultra-large mutually synchronized networks of 10 nm spin Hall nano-oscillators
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Ultra-large mutually synchronized networks of 10 nm spin Hall nano-oscillators
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Paper
Ultra-large mutually synchronized networks of 10 nm spin Hall nano-oscillators
2025
Overview
While mutually interacting spin Hall nano-oscillators (SHNOs) hold great promise for wireless communication, neural networks, neuromorphic computing, and Ising machines, the highest number of synchronized SHNOs remains limited to \\(N\\) = 64. Using ultra-narrow 10 and 20-nm nano-constrictions in W-Ta/CoFeB/MgO trilayers, we demonstrate mutually synchronized SHNO networks of up to \\(N\\) = 105,000. The microwave power and quality factor scale as \\(N\\) with new record values of 9 nW and \\(1.04 \\times 10^6\\), respectively. An unexpectedly strong array size dependence of the frequency-current tunability is explained by magnon exchange between nano-constrictions and magnon losses at the array edges, further corroborated by micromagnetic simulations and Brillouin light scattering microscopy. Our results represent a significant step towards viable SHNO network applications in wireless communication and unconventional computing.
Publisher
Cornell University Library, arXiv.org
Subject
