Optomechanical methodology for characterizing the thermal properties of 2D materials

Journal Article (2024)
Author(s)

H. Liu (TU Delft - Dynamics of Micro and Nano Systems)

Hatem Brahmi (ASML)

Carla Boix-Constant (Universidad de Valencia (ICMol))

H. S J van der Zant (Kavli institute of nanoscience Delft, TU Delft - QN/van der Zant Lab)

Peter Steeneken (Kavli institute of nanoscience Delft, TU Delft - Dynamics of Micro and Nano Systems)

G.J. Verbiest (TU Delft - Dynamics of Micro and Nano Systems)

Research Group
Dynamics of Micro and Nano Systems
Copyright
© 2024 Hanqing Liu, Hatem Brahmi, Carla Boix-Constant, H.S.J. van der Zant, P.G. Steeneken, G.J. Verbiest
DOI related publication
https://doi.org/10.1063/5.0190680
More Info
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Publication Year
2024
Language
English
Copyright
© 2024 Hanqing Liu, Hatem Brahmi, Carla Boix-Constant, H.S.J. van der Zant, P.G. Steeneken, G.J. Verbiest
Research Group
Dynamics of Micro and Nano Systems
Issue number
2
Volume number
12
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Abstract

Heat transport in two dimensions is fundamentally different from that in three dimensions. As a consequence, the thermal properties of 2D materials are of great interest, from both scientific and application points of view. However, few techniques are available for the accurate determination of these properties in ultrathin suspended membranes. Here, we present an optomechanical methodology for extracting the thermal expansion coefficient, specific heat, and thermal conductivity of ultrathin membranes made of 2H-TaS2, FePS3, polycrystalline silicon, MoS2, and WSe2. The obtained thermal properties are in good agreement with the values reported in the literature for the same materials. Our work provides an optomechanical method for determining the thermal properties of ultrathin suspended membranes, which are difficult to measure otherwise. It provides a route toward improving our understanding of heat transport in the 2D limit and facilitates engineering of 2D structures with a dedicated thermal performance.