Abstract Nanoconstriction spin Hall nano-oscillators (SHNOs) are cutting-edge spintronic devices for gigahertz signal generation and neuromorphic computing, offering a CMOS-compatible nanoscale footprint, ultra-wide frequency tunability, and robust synchronization in large networks. Most previous studies have focused on constrictions narrower than 200 nm, where a single dominant spin-wave mode typically emerges. The auto-oscillation dynamics of wide constrictions remain largely unexplored.
