Skyrmion based random bit generator

• DOI: 10.1016/j.physb.2019.411900
• Publication Date: 2019-11-25T02:31:02Z
• Authors: Israa Medlej; Abbass Hamadeh; Fouad El Haj Hassan
• Keywords: Skyrmion; Limiting; Racetrack memory; Neuromorphic engineering

Abstract Magnetic skyrmions are topologically quasi-particles offering a wide range of applications ranging from memory to oscillator and neuromorphic elements such as neurons and synapses. However, their trajectory driven by currents exhibits the so-called skyrmion Hall angle that is a limiting factor for the above-mentioned applications. Here, we study the stochastic dynamics of synthetic antiferromagnetic skyrmions driven by the spin-Hall effect in a racetrack memory with bifurcation. We show the limit of their application in programmable logic and a possible direction to use this design as a skyrmion based random bit generator.