Reconfigurable Multifunctional van der Waals Ferroelectric Devices and Logic Circuits

In our recent work [1], we explore reconfigurable ferroelectric circuits using van der Waals heterostructures, focusing on Reconfigurable Ferroelectric Field-Effect Transistors (Re-FeFETs) for versatile non-volatile logic-in-memory circuits. These devices can switch between p, n, and ambipolar modes with high on-off ratios (>10^{^6}), wide hysteresis, and a rectification ratio of 10^{^4}. Additionally, when operated as diodes, they effectively separate photogenerated carriers, making them ideal for energy harvesting.

We also show Re-FeFETs' potential as reconfigurable logic functions, demonstrating polymorphic Ferroelectric NAND/AND logic-in-memory, and XNOR electric logic with long retention times exceeding 10^{^4} seconds. The Re-FeFET circuit is impressively compact, reducing the transistor count by up to 80% compared to standard CMOS designs. These 2D van der Waals Re-FeFETs hold promise for future electronics, especially in energy-efficient in-memory computing and machine learning hardware.

[1] Reconfigurable Multifunctional van der Waals Ferroelectric Devices and Logic Circuits

Ankita Ram et al. ACS Nano 2023, Accepted (in Press)