The Ferroelectric Superconducting Field Effect Transistor

Alessandro Paghi; Laura Borgongino; Elia Strambini; Giorgio De Simoni; Lucia Sorba; Francesco Giazotto

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arXiv · 2507.04773

The Ferroelectric Superconducting Field Effect Transistor

Alessandro Paghi·Laura Borgongino·Elia Strambini·Giorgio De Simoni·Lucia Sorba·Francesco Giazotto

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Abstract

The ferroelectric field-effect transistor (Fe-FET) is a three-terminal semiconducting device first introduced in the 1950s. Despite its potential, a significant boost in Fe-FET research occurred about ten years ago with the discovery of ferroelectricity in hafnium oxide. This material has been incorporated into electronic processes since the mid-2000s. Here, we observed ferroelectricity in a superconducting Josephson FET (Fe-JoFET) operating at cryogenic temperatures below 1 Kelvin. The Fe-JoFET was fabricated on the InAsOI platform, which features an InAs epilayer hosted by an electrical insulating substrate, using HfO2 as the gate insulator, making it a promising candidate due to its ferroelectric properties. The Fe-JoFET exhibits significant hysteresis in the switching current and normal-state resistance transfer characteristics, which depend on the range of gate voltages. This phenomenon opens a new research area exploring the interaction between ferroelectricity and superconductivity in hybrid superconducting-semiconducting systems, with potential applications in cryogenic data storage and computation. Supporting this, the Fe-JoFET was operated as a cryogenic superconducting single memory cell, exhibiting both dissipative and non-dissipative states. Its non-volatility was tested over a 24-hour measurement period. We also demonstrated that the Fe-JoFET can retain information at temperatures above the superconductor critical temperature, resulting in a temperature-fault-tolerant memory cell resistant to temperature oscillations or, in the worst case, cryostat faults.

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Alessandro Paghi, Laura Borgongino, Elia Strambini, Giorgio De Simoni, Lucia Sorba, Francesco Giazotto. 2025-07-07. The Ferroelectric Superconducting Field Effect Transistor. https://arxiv.org/abs/2507.04773

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