A multiple negative differential resistance heterojunction device and its circuit application to ternary static...

Area of Science:

• Condensed Matter Physics
• Materials Science
• Nanotechnology

Background:

• Conventional binary logic systems face limitations in bit density.
• Negative differential resistance (NDR) phenomenon enables devices with two threshold voltages (VTH).
• Van der Waals (vdW) heterostructures offer potential for advanced electronic devices.

Purpose of the Study:

• To demonstrate a single device exhibiting multiple negative differential resistance (m-NDR) for ternary logic.
• To integrate the m-NDR device into functional ternary circuits.
• To explore the potential for ternary static random-access memory (SRAM).

Main Methods:

• Fabrication of a BP/(ReS2 + HfS2) type-III double-heterostructure for m-NDR.
• Integration of the m-NDR device with a vdW transistor.
• Theoretical verification of ternary latch and SRAM operations.

Main Results:

• Successfully created a single device exhibiting m-NDR.
• Demonstrated a ternary vdW latch circuit capable of storing three logic states.
• Theoretically verified high-speed write and read operations for ternary SRAM.

Conclusions:

• The developed m-NDR device is a key component for advanced ternary logic.
• Ternary vdW circuits offer a pathway to increased data storage density.
• This work paves the way for next-generation high-density memory technologies.