Boosting Polarization Switching-Induced Current Injection by Mechanical Force in Ferroelectric Thin Films.

ABSTRACT: When scaling the lateral size of a ferroelectric random access memory (FeRAM) device down to the nanometer range, the polarization switching-induced displacement current becomes small and challenging to detect, which greatly limits the storage density of FeRAM. Here, we report the observation of significantly enhanced injection currents, much larger than typical switching currents, induced by polarization switching in BiFeO₃ thin films via conductive atomic force microscopy. Interestingly, this injected current can be effectively modulated by applying mechanical force. As the loading force increases from ∼50 to ∼750 nN, the magnitude of the injected current increases and the critical voltage to trigger the current injection decreases. Notably, changing the loading force by an or

SUBMITTER: Zhang F 

PROVIDER: S-EPMC8289170 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature