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Tunable random telegraph noise in stable perpendicular magnetic tunnel junctions for unconventional computing
Phys. Rev. Applied 25, 014035 – Published 14 January, 2026
DOI: https://doi.org/10.1103/tbm9-6938
Abstract
This paper is a contribution to the Physical Review Applied collection titled Physics-Inspired Computing.
We demonstrate that thermally stable perpendicular magnetic tunnel junctions, widely used in spin-transfer torque magnetic random-access memory, can be actuated with nanosecond pulses to exhibit tunable stochastic behavior. This actuated-stochastic tunnel junction (A-sMTJ) concept produces random telegraph noise, with control over fluctuation rate and probability bias. The device response is shown to be consistent with a Poisson process, with fluctuation rates tunable over two orders of magnitude, with average state dwell times ranging from approximately 30 ns to . These results establish A-sMTJ as a versatile platform for integrating deterministic, stochastic, and in-memory functionality on a single chip—advancing the development of probabilistic, neuromorphic, and unconventional computing systems.
Physics Subject Headings (PhySH)
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This article appears in the following collection:
Collection on Physics-Inspired Computing
Physical Review Applied is pleased to present a Collection on Physics-Inspired Computing, highlighting the rapidly evolving field of energy-efficient computing techniques, from hardware technologies to algorithms, where physics inspiration serves as the crucial link. Contributions to this collection will be published throughout 2025. This Collection is being curated by Guest Editors Kerem Camsari and Supriyo Datta.
