Kavli Affiliate: Herre S. J. Van Der Zant
| First 5 Authors: Hanqing Liu, Hatem Brahmi, Carla Boix-Constant, Herre S. J. van der Zant, Peter G. Steeneken
| Summary:
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, both from scientific and application point of view. However,
few techniques are available for 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 values reported in the literature for the same materials. Our work
provides an optomechanical method for determining thermal properties of
ultrathin suspended membranes, that are difficult to measure otherwise. It can
does provide a route towards improving our understanding of heat transport in
the 2D limit and facilitates engineering of 2D structures with dedicated
thermal performance.
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