Reconfigurable van der Waals Junction Field Effect Transistor with Anchored Threshold and Enhanced Subthreshold Swing...

Area of Science:

• Materials Science
• Electronics Engineering
• Semiconductor Physics

Background:

• Reconfigurable circuits offer enhanced versatility but often face challenges with asymmetric device characteristics.
• Existing field-effect transistors can exhibit performance limitations due to unmatched threshold voltages and high subthreshold swing.

Purpose of the Study:

• To investigate the potential of van der Waals junction field-effect transistors (JFETs) for advanced reconfigurable circuits.
• To address the asymmetric transfer curve issue in reconfigurable devices through an optimized gate design.

Main Methods:

• Fabrication of a reconfigurable JFET using WSe2/MoS2 van der Waals heterojunctions.
• Implementation of an optimized polarity gate design to control threshold voltages and subthreshold swing.
• Demonstration of complementary JFET inverters and various logic gates (NOR/NAND, XOR/XNOR).

Main Results:

• The proposed WSe2/MoS2 JFET exhibits symmetric transfer characteristics and excellent switching behavior.
• Achieved a high noise margin of 96.3% and a gain of 153.82 in JFET inverters.
• Successfully constructed reconfigurable logic gates with sharp switching and symmetric profiles, demonstrating reduced power consumption.

Conclusions:

• The optimized WSe2/MoS2 JFET design effectively resolves asymmetry issues in reconfigurable circuits.
• This approach paves the way for high-performance, low-power, and versatile reconfigurable electronics within the CMOS framework.
• The developed JFET technology shows significant promise for next-generation electronic systems.