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arXiv · 1905.00764

Optomechanical measurement of thermal transport in two-dimensional MoSe2 lattices

Nicolas Morell·Slaven Tepsic·Antoine Reserbat-Plantey·Andrea Cepellotti·Marco Manca·Itai Epstein·Andreas Isacsson·Xavier Marie·Francesco Mauri·Adrian Bachtold
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Abstract

Nanomechanical resonators have emerged as sensors with exceptional sensitivities. These sensing capabilities open new possibilities in the studies of the thermodynamic properties in condensed matter. Here, we use mechanical sensing as a novel approach to measure the thermal properties of low-dimensional materials. We measure the temperature dependence of both the thermal conductivity and the specific heat capacity of a transition metal dichalcogenide (TMD) monolayer down to cryogenic temperature, something that has not been achieved thus far with a single nanoscale object. These measurements show how heat is transported by phonons in two-dimensional systems. Both the thermal conductivity and the specific heat capacity measurements are consistent with predictions based on first-principles.

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Nicolas Morell, Slaven Tepsic, Antoine Reserbat-Plantey, Andrea Cepellotti, Marco Manca, Itai Epstein, Andreas Isacsson, Xavier Marie, Francesco Mauri, Adrian Bachtold. 2019-05-02. Optomechanical measurement of thermal transport in two-dimensional MoSe2 lattices. https://doi.org/10.1021/acs.nanolett.9b00560

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