Device simulation study of multilayer MoS₂Schottky barrier field-effect transistors.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Molybdenum disulfide (MoS₂) is a 2D semiconductor with tunable electronic properties based on layer number.
• MoS₂ field-effect transistors (FETs) are promising for nanoelectronics due to atomic thickness and high electrical properties.
• Fermi-level pinning at metal contacts significantly affects MoS₂ FET characteristics.

Purpose of the Study:

• Investigate the impact of metal contacts on multilayer MoS₂ Schottky barrier FET (SBFET) performance.
• Explore methods to achieve p-type and ambipolar transport in MoS₂ SBFETs.
• Propose device configurations for enhanced electrical and photonic applications.

Main Methods:

• Computational device modeling of multilayer MoS₂ SBFETs.
• Analysis of metal-contact effects on device characteristics.
• Simulation of device operation with asymmetric metal electrodes and dual-split gate geometry.

Main Results:

• Demonstrated feasibility of p-type MoS₂ SBFETs with specific metal choices and gate control.
• Proposed ambipolar multilayer MoS₂ SBFETs exhibiting gate-voltage dependent transport.
• Achieved four distinct operating configurations (p-p, n-n, p-n, n-p) with dual-split gates.
• Calculated electrical characteristics showing potential for high rectification ratios.

Conclusions:

• Optimizing metal contacts is crucial for controlling MoS₂ SBFET performance.
• Tunable p-type and ambipolar transport can be achieved in multilayer MoS₂ SBFETs.
• Advanced device geometries enable versatile operation for efficient electronic and photonic devices.