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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Semiconductor Physics

Background:

  • Two-dimensional (2D) semiconductors, like transition-metal dichalcogenides (TMDs), are promising for advanced electronics due to their atomic thinness and gate control.
  • Current limitations in circuit design stem from the lack of accurate, efficient compact models for 2D field-effect transistors (FETs) in SPICE simulations.

Purpose of the Study:

  • To develop a physics-based, fully analytical, and SPICE-compatible compact model for 2D FETs.
  • To address the need for robust and computationally efficient modeling in 2D semiconductor circuit design.

Main Methods:

  • Developed a closed-form analytical framework incorporating physical mechanisms like interface traps and mobility degradation.
  • Utilized an efficient approximation of the Lambert W function to avoid iterative solvers and segmentation.
  • Validated the model against experimental data for single devices and various integrated circuits.

Main Results:

  • Achieved quantitative agreement between the model and experimental data for device characteristics and circuit dynamics.
  • Demonstrated the model's fidelity in simulating inverters, SRAM cells, NAND gates, and ring oscillators.
  • Ensured SPICE compatibility without compromising accuracy or efficiency.

Conclusions:

  • Established a robust and scalable modeling approach for 2D FETs.
  • Successfully bridged the gap between device-level physics and system-level circuit design for 2D semiconductors.
  • Paved the way for practical realization of complex integrated circuits based on 2D TMDs.