Enabling Advanced Bioinspired Computing and Hardware Security in Sb₂(S,Se)₃ Memristors via Titanium Interfacial...

Area of Science:

• Materials Science
• Neuroscience
• Computer Science

Background:

• Memristor performance is limited by the electrode/functional layer interface, hindering neuromorphic computing.
• Chalcogenide semiconductors offer unique stimuli sensitivity but require interface optimization.
• Developing stable memristors is crucial for advanced AI sensory perception and secure data processing.

Purpose of the Study:

• To engineer a novel Ti/Sb₂(S,Se)₃ heterojunction interface for improved memristor performance.
• To address the bottleneck in ion migration and charge injection at the memristor interface.
• To enable memristors for complex biomimetic functions and secure computing.

Main Methods:

• Fabrication of a novel Ti/Sb₂(S,Se)₃ heterojunction interface.
• Interfacial engineering to reduce the built-in electric field and facilitate stable selenium vacancy conductive filaments (CFs).
• Characterization of memristor performance, including on/off ratio, endurance, and retention.

Main Results:

• The engineered interface successfully reduced the built-in electric field, enabling stable selenium vacancy CFs.
• Sb₂(S,Se)₃ memristors demonstrated superior performance: high on/off ratio, stable endurance, and long-term retention.
• The device simulated image encryption and emulated nociceptive perception, showcasing biomimetic capabilities.

Conclusions:

• Interfacial engineering is a versatile strategy for developing stable, high-performance chalcogenide memristors.
• The novel Ti/Sb₂(S,Se)₃ interface enhances memristors for advanced bioinspired and secure computing.
• This work paves the way for sophisticated sensory perception and secure data processing in neuromorphic systems.