Electric field effect in heat transfer in 2D devices

Area of Science:

• Condensed matter physics
• Materials science
• Thermal transport

Background:

• Heat transfer is crucial for electronic device performance.
• Graphene and dielectric interfaces are key components in modern electronics.
• Understanding gate-voltage-modulated thermal transport is essential for device optimization.

Purpose of the Study:

• To investigate the impact of gate voltage on heat transfer between a 2D sheet and a dielectric.
• To analyze the contributions of radiative and phonon heat transfer mechanisms.
• To explore the role of electric fields and surface displacements in thermal transport.

Main Methods:

• Theoretical calculation of heat transfer.
• Modeling electrostatic and van der Waals interactions.
• Incorporating nonlocality in interaction calculations.
• Numerical simulations for graphene-SiO2 system.

Main Results:

• Gate voltage induces surface charges, creating electric fields that modify heat transfer.
• Electric fields enhance radiative heat transfer via coupled surface displacements.
• Electrostatic and van der Waals interactions contribute to phonon heat transfer.
• Nonlocal effects are considered in phonon heat transfer calculations.

Conclusions:

• Gate voltage significantly alters heat transfer at 2D material-dielectric interfaces.
• Both radiative and phonon heat transfer are modulated by electric fields.
• The findings provide insights for thermal management in electronic devices utilizing 2D materials.