Optomechanical Measurement of Thermal Transport in Two-Dimensional MoSe2 Lattices
Journal article, 2019
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 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.
transition metal dichalcogenide
Optomechanical resonator
NEMS
monolayer
MoSe 2
specific heat
thermal transport
Author
Nicolas Morell
Barcelona Institute of Science and Technology (BIST)
Slaven Tepsic
Barcelona Institute of Science and Technology (BIST)
Antoine Reserbat-Plantey
Barcelona Institute of Science and Technology (BIST)
Andrea Cepellotti
Lawrence Berkeley National Laboratory
University of California
Marco Manca
University of Toulouse
Itai Epstein
Barcelona Institute of Science and Technology (BIST)
Andreas Isacsson
Chalmers, Physics, Condensed Matter Theory
Xavier Marie
University of Toulouse
Francesco Mauri
Sapienza University of Rome
A. Bachtold
Barcelona Institute of Science and Technology (BIST)
Nano Letters
1530-6984 (ISSN) 1530-6992 (eISSN)
Vol. 19 5 3143-3150Subject Categories
Energy Engineering
Other Materials Engineering
Condensed Matter Physics
DOI
10.1021/acs.nanolett.9b00560