@article{8f5abda5fa014271b5abb431730ebf20,
title = "Temperature- and power-dependent phonon properties of suspended few layers of tungsten diselenide",
abstract = "In this study we report the temperature- and laser power-dependence of the out-of-plane A1g Raman mode of mechanically exfoliated few-layered WSe2 suspended on Si3N4 holes. The A1g phonon frequency is red-shifted for a temperature in the range 77–548 K, with first-order temperature coefficients estimated to be −0.0083 and −0.0079 cm−1/K for suspended four- and six-layer WSe2, respectively. The laser power-dependence of suspended four-layer WSe2 sample is estimated to be −0.0079 cm−1/μW and no shift is observed for six-layer WSe2. By using the laser power-dependence of the suspended four layers WSe2 and the 1D Balandin's approach, we calculate the in-plane thermal conductivity of WSe2 at room temperature to be ∼57.7 W/m K.",
author = "Viana, {Bartolomeu C.} and Alencar, {Rafael S.} and Vieira, {Anderson G.} and Victor Carozo and Filho, {A. G.Souza} and Junjie Wang and {da Luz-Lima}, Cle{\^a}nio and S. Feng and N{\'e}stor Perea-L{\'o}pez and Jun Zhu and Mauricio Terrones",
note = "Funding Information: B.C. Viana, acknowledges the support from CNPQ PVE Grant No. 400397/2014-5 , and the CNPq 06/2019 – Bolsas de Produtividade em Pesquisa Grant No. 307901/2019-0 . AGSF acknowledge grants from CNPq (309309/2017-4 and 442577/2019-2) and CAPES (Procad 88881.068457/2014-01). We also acknowledge the support from the U.S. Army Research Office MURI grant W911NF-11-1-0362, and NSF MRSEC center under the award DMR-1420620. This work was mainly supported by the Air Force Office of Scientific Research (AFOSR) through Grant No. FA9550-18-1-0072 and the NSF-IUCRC Center for Atomically Thin Multifunctional Coatings (ATOMIC). Publisher Copyright: {\textcopyright} 2020",
year = "2020",
month = nov,
doi = "10.1016/j.vibspec.2020.103169",
language = "English (US)",
volume = "111",
journal = "Vibrational Spectroscopy",
issn = "0924-2031",
publisher = "Elsevier B.V.",
}