VO2 Oscillator Circuits Optimized for Ultrafast, 100 MHz-Range Operation

Pollner, Zsigmond and Török, Tímea Nóra and Pósa, László and Csontos, Miklós and Schmid, Sebastian Werner and Balogh, Zoltán and Bükkfejes, András and Kim, Heungsoo and Piqué, Alberto and Leuthold, Juerg and Volk, János and Halbritter, András Ernő (2025) VO2 Oscillator Circuits Optimized for Ultrafast, 100 MHz-Range Operation. ADVANCED ELECTRONIC MATERIALS, in pre. No. e00433. ISSN 2199-160X

Preview

Text AdvElectMaterials-2025-Pollner-VO2.pdf - Published Version Available under License Creative Commons Attribution. Download (1MB) | Preview

Abstract

Oscillating neural networks are promising candidates for a new computational paradigm, where complex optimization problems are solved by physics itself through the synchronization of coupled oscillating circuits. VO 2 Mott memristors are particularly promising building blocks for such oscillating neural networks. Until now, however, not only the maximum frequency of VO 2 oscillating neural networks, but also the maximum frequency of individual VO 2 oscillators is severely limited, which has restricted their efficient and energy‐saving use. In this study, it is showed how to increase the oscillating frequency by more than an order of magnitude into the 100 MHz range utilizing ultrasmall, ≈30 nm wide active volume VO 2 devices and optimizing the circuit layout for high frequency operation. In addition, the physical limiting factors of the oscillation frequencies are studied by investigating the complex switching dynamics of our nanoscale VO 2 devices. These dynamical studies, together with simulations, provide a clear conclusion on the maximum achievable operating frequencies and the optimal operating parameters under which these can be reached.

Actions (login required)

Edit Item