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Updated: May 8, 2025
05:20
Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
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Ultrahigh Thermal Conductance across Superlubric Interfaces in Twisted Graphite.
Fuwei Yang1,2,3,4, Wenjiang Zhou1,5,6, Zhibin Zhang7
1Peking University, National Key Laboratory of Advanced MicroNanoManufacture Technology, Beijing 100871, China.
Physical Review Letters
|April 25, 2025
Summary
Interlayer rotation in van der Waals materials enables structural superlubricity and controls heat flow. This study precisely measures thermal conductance in twisted graphite, revealing significant variations and a link between sliding resistance and heat transport.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Van der Waals (vdW) materials exhibit unique properties upon interlayer rotation, including structural superlubricity and potential for thermal management.
- Controlling heat flow in twisted vdW materials is theoretically predicted but experimentally challenging due to inconsistent results.
Purpose of the Study:
- To experimentally measure and characterize the thermal transport properties of intrinsic twisted interfaces in vdW materials.
- To investigate the correlation between interlayer rotation, sliding resistance, and thermal conductance.
- To lay the foundation for twist-enabled thermal management in advanced electronics.
Main Methods:
- Simultaneous mechanical characterization and thermal measurements of microfabricated graphite mesas with twisted interfaces.
- Atomic simulations to elucidate the role of phonons in interfacial thermal transport.
Main Results:
- Superlubric interfaces achieved a thermal conductance of ~600 MWm⁻²K⁻¹, significantly higher than artificial vdW structures.
- A >30-fold variation in thermal conductance was observed upon rotating interfaces to a locked state.
- Atomic simulations identified transverse acoustic phonons as dominant in interfacial thermal transport.
Conclusions:
- A direct correlation exists between interfacial thermal transport and sliding resistance in twisted vdW materials.
- Twist-enabled thermal management is a viable strategy, particularly beneficial for twistronics and slidetronics applications.
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