Non-hermiticity in spintronics: oscillation death in coupled spintronic nano-oscillators through emerging exceptional points.

ABSTRACT: The emergence of exceptional points (EPs) in the parameter space of a non-hermitian (2D) eigenvalue problem has long been interest in mathematical physics, however, only in the last decade entered the scope of experiments. In coupled systems, EPs give rise to unique physical phenomena, and enable the development of highly sensitive sensors. Here, we demonstrate at room temperature the emergence of EPs in coupled spintronic nanoscale oscillators and exploit the system's non-hermiticity. We observe amplitude death of self-oscillations and other complex dynamics, and develop a linearized non-hermitian model of the coupled spintronic system, which describes the main experimental features. The room temperature operation, and CMOS compatibility of our spintronic nanoscale oscillators means that

SUBMITTER: Wittrock S 

PROVIDER: S-EPMC10834588 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature