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The emergence of exceptional points (EPs) in the parameter space of anon-hermitian (2D) eigenvalue problem is studied in a general sense inmathematical physics, and has in the last decade successively reached the scopeof experiments. In coupled systems, it gives rise to unique physical phenomena,which enable novel approaches for the development of seminal types of highlysensitive sensors. Here, we demonstrate at room temperature the emergence ofEPs in coupled spintronic nanoscale oscillators and hence exploit the system'snon-hermiticity. We describe the observation of amplitude death ofself-oscillations and other complex dynamics, and develop a linearizednon-hermitian model of the coupled spintronic system, which properly describesthe main experimental features. Interestingly, these spintronic nanoscaleoscillators are deployment-ready in different applicational technologies, suchas field, current or rotation sensors, radiofrequeny and wireless devices and,more recently, novel neuromorphic hardware solutions. Their unique andversatile properties, notably their large nonlinear behavior, open upunprecedented perspectives in experiments as well as in theory on the physicsof exceptional points. Furthermore, the exploitation of EPs in spintronicsdevises a new paradigm for ultrasensitive nanoscale sensors and theimplementation of complex dynamics in the framework of non-conventionalcomputing.

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