Band and Field Coengineered Charge Trap Memristor via Au Nanoparticle Layer for Programming Speed Enhancement

Area of Science:

• Materials Science
• Electrical Engineering
• Nanotechnology

Background:

• Charge trap memristors (CTMs) are key for nonvolatile analog computing and synaptic arrays due to low-current operation.
• The inherent slowness of charge trapping limits the operational speed of CTM devices.

Purpose of the Study:

• To enhance the programming speed of CTM devices.
• To investigate the impact of gold nanoparticles (Au NPs) on CTM performance.

Main Methods:

• Fabrication of a CTM device incorporating a gold nanoparticle (Au NP) layer (NP-CTM).
• Experimental characterization of the NP-CTM device's speed, stability, and retention.
• Multiphysics simulations and conduction band model analysis to understand the underlying mechanisms.

Main Results:

• The NP-CTM demonstrated a programming speed improvement of approximately 47.6 times compared to conventional CTMs.
• The device maintained excellent stability and data retention characteristics.
• Enhanced electric fields and an engineered band structure due to Au NPs were identified as key factors.

Conclusions:

• The proposed NP-CTM design significantly accelerates programming speed.
• The enhanced performance is attributed to the unique properties of Au NPs.
• This advancement makes CTMs more suitable for high-speed, large-scale memory and neuromorphic computing applications.