2025/01/30 by Nilamani Behera, Behera, Nilamani, Avinash Kumar Chaurasiya +13 · 2 citations
Computer Science · Physics and Astronomy · #Applied Physics (physics.app-ph) #FOS: Physical sciences #Magnetic properties of thin films #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Nonlinear Dynamics and Pattern Formation #Quantum and electron transport phenomena
paper · pdf · doi:10.48550/arxiv.2501.18321
openalex publication_date 2025/01/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
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 × 106, 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.