Sensory gating in bilayer amorphous carbon memristors

Area of Science:

• Materials Science
• Device Physics
• Computational Neuroscience

Background:

• Conventional non-volatile memory technologies are limited by binary (two-state) storage.
• Artificial neural networks require efficient memory components that mimic biological synapses.

Purpose of the Study:

• To develop multi-state amorphous carbon-based memory devices.
• To investigate their potential for higher memory density and neuromorphic applications.
• To explore synaptic functionalities, such as paired-pulse inhibition.

Main Methods:

• Fabrication of amorphous carbon-based resistive switching memory devices.
• Characterization of bipolar and unipolar resistive switching behaviors.
• Analysis of device performance for synaptic function emulation.

Main Results:

• Devices exhibit independent bipolar and unipolar resistive switching, enabling multi-state operation.
• Achieved higher memory density compared to binary memory.
• Demonstrated paired-pulse inhibition at bio-realistic timescales (<100 ms).

Conclusions:

• Amorphous carbon devices offer a pathway to advanced non-volatile memory with increased density.
• The observed synaptic behaviors make them suitable for artificial neural networks and neuromorphic circuits.
• These devices can serve as synapse-inspired memory or filters for specialized sensors.