Giant tunnelling electroresistance in atomic-scale ferroelectric tunnel junctions.

ABSTRACT: Ferroelectric tunnel junctions are promising towards high-reliability and low-power non-volatile memories and computing devices. Yet it is challenging to maintain a high tunnelling electroresistance when the ferroelectric layer is thinned down towards atomic scale because of the ferroelectric structural instability and large depolarization field. Here we report ferroelectric tunnel junctions based on samarium-substituted layered bismuth oxide, which can maintain tunnelling electroresistance of 7 × 10⁵ with the samarium-substituted bismuth oxide film down to one nanometer, three orders of magnitude higher than previous reports with such thickness, owing to efficient barrier modulation by the large ferroelectric polarization. These ferroelectric tunnel junctions demonstrate up to

SUBMITTER: Jia Y 

PROVIDER: S-EPMC10808203 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature