Two-dimensional layered MSi₂N₄ (M = Mo, W) as promising thermal management materials: a comparative study

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Efficient heat removal is critical for nanoelectronic devices.
• Two-dimensional (2D) materials are promising for thermal management due to high thermal conductivity and flexibility.

Purpose of the Study:

• Investigate the thermal conductivity of novel 2D layered MSi2N4 (M = Mo, W).
• Identify potential 2D materials for advanced thermal management applications.

Main Methods:

• Solved the phonon Boltzmann transport equation (BTE).
• Employed first-principles calculations.
• Analyzed thermal properties of MSi2N4 materials.

Main Results:

• Monolayer MoSi2N4 shows a thermal conductivity of 162 W m-1 K-1.
• MoSi2N4 exhibits significantly higher thermal conductivity than WSi2N4 and MoS2.
• High thermal conductivity is attributed to large group velocity and low anharmonicity.

Conclusions:

• MoSi2N4 possesses competitive thermal conductivity for thermal management.
• MoSi2N4 is a potential candidate for 2D thermal management materials in nanoelectronics.