Frequency as a Clock: Synchronization and Intrinsic Recovery in Graphene Transistor Dynamics

Victor Lopez-Richard; Igor Ricardo Filgueira e Silva; Gabriel L. Rodrigues; Rafael Furlan de Oliveira; Kenji Watanabe; Takashi Taniguchi; Alisson R. Cadore

arXiv · 2506.08728

Frequency as a Clock: Synchronization and Intrinsic Recovery in Graphene Transistor Dynamics

Victor Lopez-Richard·Igor Ricardo Filgueira e Silva·Gabriel L. Rodrigues·Rafael Furlan de Oliveira·Kenji Watanabe·Takashi Taniguchi·Alisson R. Cadore

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Abstract

Hysteresis and memory effects in graphene field-effect transistors (GFETs) offer unique opportunities for neuromorphic computing, sensing, and memory applications, yet their physical origins remain debated due to competing volatile and nonvolatile interpretations. Here, we present a unified dynamic model that captures the essential physics of the GFET response under periodic gate modulation, accounting for both intrinsic relaxation processes and externally driven charge transfer. By modeling non-equilibrium carrier dynamics as a competition between injection and reabsorption rates, we uncover two distinct regimes: one governed by intrinsic, frequency-independent relaxation and another exhibiting frequency-locked behavior where the response is tied to the external drive. This distinction resolves apparent nonvolatile effects and explains loop invariance in floating-gate structures via displacement current-driven charge injection. Our framework predicts the evolution of the hysteresis loop shape, amplitude, and direction across a wide range of driving conditions, offering a versatile tool for interpreting experimental results and guiding the design of next-generation graphene-based electronic systems.

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Victor Lopez-Richard, Igor Ricardo Filgueira e Silva, Gabriel L. Rodrigues, Rafael Furlan de Oliveira, Kenji Watanabe, Takashi Taniguchi, Alisson R. Cadore. 2025-10-08. Frequency as a Clock: Synchronization and Intrinsic Recovery in Graphene Transistor Dynamics. https://arxiv.org/abs/2506.08728

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