Temperature- and power-dependent phonon properties of suspended few layers of tungsten diselenide

Bartolomeu C. Viana; Rafael S. Alencar; Anderson G. Vieira; Victor Carozo; A. G.Souza Filho; Junjie Wang; Cleânio da Luz-Lima; S. Feng; Néstor Perea-López; Jun Zhu; Mauricio Terrones

doi:10.1016/j.vibspec.2020.103169

Temperature- and power-dependent phonon properties of suspended few layers of tungsten diselenide

Bartolomeu C. Viana
, Rafael S. Alencar
, Anderson G. Vieira
, Victor Carozo
, A. G.Souza Filho
, Junjie Wang
, Cleânio da Luz-Lima
, S. Feng
, Néstor Perea-López
, Jun Zhu
, Mauricio Terrones

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

In this study we report the temperature- and laser power-dependence of the out-of-plane A_1g Raman mode of mechanically exfoliated few-layered WSe₂ suspended on Si₃N₄ holes. The A_1g 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.

Original language	English (US)
Article number	103169
Journal	Vibrational Spectroscopy
Volume	111
DOIs	https://doi.org/10.1016/j.vibspec.2020.103169
State	Published - Nov 2020

All Science Journal Classification (ASJC) codes

Spectroscopy

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10.1016/j.vibspec.2020.103169

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@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.",

}

TY - JOUR

T1 - Temperature- and power-dependent phonon properties of suspended few layers of tungsten diselenide

AU - Viana, Bartolomeu C.

AU - Alencar, Rafael S.

AU - Vieira, Anderson G.

AU - Carozo, Victor

AU - Filho, A. G.Souza

AU - Wang, Junjie

AU - da Luz-Lima, Cleânio

AU - Feng, S.

AU - Perea-López, Néstor

AU - Zhu, Jun

AU - Terrones, Mauricio

N1 - 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: © 2020

PY - 2020/11

Y1 - 2020/11

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85093923821

UR - https://www.scopus.com/pages/publications/85093923821#tab=citedBy

U2 - 10.1016/j.vibspec.2020.103169

DO - 10.1016/j.vibspec.2020.103169

M3 - Article

AN - SCOPUS:85093923821

SN - 0924-2031

VL - 111

JO - Vibrational Spectroscopy

JF - Vibrational Spectroscopy

M1 - 103169

ER -

Temperature- and power-dependent phonon properties of suspended few layers of tungsten diselenide

Abstract

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