Logic and in-memory computing achieved in a single ferroelectric semiconductor transistor.

Area of Science:

• Materials Science
• Solid State Physics
• Microelectronics Engineering

Background:

• The microelectronics field demands processors with higher performance and novel architectures.
• Integrating multiple material properties into single devices offers a promising solution.
• Combining ferroelectric and semiconducting properties is a key strategy for advanced functionalities.

Purpose of the Study:

• To demonstrate the integration of logic, in-memory computing, and optoelectrical functionalities into a single transistor.
• To explore the capabilities of ferroelectric semiconducting α-In2Se3 as a channel material.
• To investigate the potential of light as an additional input for complex computing operations.

Main Methods:

• Fabrication of transistors using ferroelectric semiconducting α-In2Se3 as the channel.
• Characterization of logic operations (AND, OR) and non-volatile logic operations (NOR, NAND).
• Evaluation of optoelectrical logic and in-memory computing functions with light as an input.

Main Results:

• Single transistors achieved integrated logic, in-memory, and optoelectrical functionalities.
• Demonstrated two-input AND, OR, non-volatile NOR, and NAND logic operations with high on/off ratios (5 orders), good endurance (1000 cycles), and fast speed (10 μs).
• Achieved optoelectrical OR, non-volatile IMP operations, and ternary-input optoelectrical logic and in-memory computing using light input.

Conclusions:

• Ferroelectric semiconducting α-In2Se3 enables complex logic and computing functions in a single transistor.
• This approach offers a pathway to novel device architectures and enhanced microelectronic performance.
• The integration of light as an input expands the capabilities for advanced computing applications.