Methods for Measuring Thermal Conductivity of Two-Dimensional Materials: A Review

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Two-dimensional (2D) materials possess exceptional properties, making them vital for microelectronics.
• Heat dissipation is critical for the performance and reliability of 2D material-based devices.
• Thermal conductivity is a key metric for evaluating heat dissipation in 2D materials.

Purpose of the Study:

• To systematically review and compare theoretical and experimental methods for characterizing 2D material thermal conductivity.
• To discuss factors influencing thermal conductivity in 2D materials.
• To provide future prospects for thermal conductivity characterization techniques.

Main Methods:

• Theoretical methods: Molecular Dynamics, Phonon Boltzmann Transport Equation, Atomic Green's Function.
• Experimental methods: Suspended Micro-bridge, 3ω, Time-Domain Thermoreflectance, Raman Spectroscopy.
• Critical review and comparison of established and emerging techniques.

Main Results:

• Detailed introduction and comparison of various theoretical approaches.
• Comprehensive review of experimental techniques with critical analysis.
• Discussion of physical factors impacting thermal conductivity.

Conclusions:

• An in-depth understanding of current thermal conductivity measurement methods for 2D materials is presented.
• The review offers guidance for selecting appropriate characterization techniques for 2D materials.
• This work is significant for the advancement of 2D materials in micro/nanodevices.