Temperature- and power-dependent phonon properties of suspended continuous WS2 monolayer films

Anderson G. Vieira, Cleanio Luz-Lima, Gardenia S. Pinheiro, Zhong Lin, Julio A. Rodríguez-Manzo, Nestor Perea Lopez, Ana Laura Elias Arriaga, Marija Drndić, Mauricio Terrones Maldonado, Humberto Terrones, Bartolomeu C. Viana

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Abstract

This manuscript reports temperature- and power-dependence of in-plane E1 2g and out-of-plane A1g Raman modes in a continuous WS2 monolayer film (CWMF) prepared using low pressure chemical vapor deposition (LPCVD), suspended on a perforated substrate. The frequencies of these two phonon modes vary linearly with temperature (77–523 K) and power (2–14 μW), and the modes soften as local temperature increases. The first-order temperature coefficients for E1 2g and A1g modes are 0.0124 and 0.0112 cm−1/K, respectively, and power coefficients are 0.1228 and 0.1381 cm−1/μW. Using the 1D Balandin's approach, we have calculated the thermal conductivity of the suspended CWMF at room temperature to be ca. 20 and 16 W/mK when considering the E1 2g and A1g modes, respectively. Our results provide thermal properties values of CWMF, which are very important for developing monolayer WS2 electronic devices.

Original languageEnglish (US)
Pages (from-to)270-276
Number of pages7
JournalVibrational Spectroscopy
Volume86
DOIs
StatePublished - Sep 1 2016

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Monolayers
Temperature
Low pressure chemical vapor deposition
Thermal conductivity
Thermodynamic properties
Substrates

All Science Journal Classification (ASJC) codes

  • Spectroscopy

Cite this

Vieira, A. G., Luz-Lima, C., Pinheiro, G. S., Lin, Z., Rodríguez-Manzo, J. A., Perea Lopez, N., ... Viana, B. C. (2016). Temperature- and power-dependent phonon properties of suspended continuous WS2 monolayer films. Vibrational Spectroscopy, 86, 270-276. https://doi.org/10.1016/j.vibspec.2016.08.004
Vieira, Anderson G. ; Luz-Lima, Cleanio ; Pinheiro, Gardenia S. ; Lin, Zhong ; Rodríguez-Manzo, Julio A. ; Perea Lopez, Nestor ; Elias Arriaga, Ana Laura ; Drndić, Marija ; Terrones Maldonado, Mauricio ; Terrones, Humberto ; Viana, Bartolomeu C. / Temperature- and power-dependent phonon properties of suspended continuous WS2 monolayer films. In: Vibrational Spectroscopy. 2016 ; Vol. 86. pp. 270-276.
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abstract = "This manuscript reports temperature- and power-dependence of in-plane E1 2g and out-of-plane A1g Raman modes in a continuous WS2 monolayer film (CWMF) prepared using low pressure chemical vapor deposition (LPCVD), suspended on a perforated substrate. The frequencies of these two phonon modes vary linearly with temperature (77–523 K) and power (2–14 μW), and the modes soften as local temperature increases. The first-order temperature coefficients for E1 2g and A1g modes are 0.0124 and 0.0112 cm−1/K, respectively, and power coefficients are 0.1228 and 0.1381 cm−1/μW. Using the 1D Balandin's approach, we have calculated the thermal conductivity of the suspended CWMF at room temperature to be ca. 20 and 16 W/mK when considering the E1 2g and A1g modes, respectively. Our results provide thermal properties values of CWMF, which are very important for developing monolayer WS2 electronic devices.",
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Temperature- and power-dependent phonon properties of suspended continuous WS2 monolayer films. / Vieira, Anderson G.; Luz-Lima, Cleanio; Pinheiro, Gardenia S.; Lin, Zhong; Rodríguez-Manzo, Julio A.; Perea Lopez, Nestor; Elias Arriaga, Ana Laura; Drndić, Marija; Terrones Maldonado, Mauricio; Terrones, Humberto; Viana, Bartolomeu C.

In: Vibrational Spectroscopy, Vol. 86, 01.09.2016, p. 270-276.

Research output: Contribution to journalArticle

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T1 - Temperature- and power-dependent phonon properties of suspended continuous WS2 monolayer films

AU - Vieira, Anderson G.

AU - Luz-Lima, Cleanio

AU - Pinheiro, Gardenia S.

AU - Lin, Zhong

AU - Rodríguez-Manzo, Julio A.

AU - Perea Lopez, Nestor

AU - Elias Arriaga, Ana Laura

AU - Drndić, Marija

AU - Terrones Maldonado, Mauricio

AU - Terrones, Humberto

AU - Viana, Bartolomeu C.

PY - 2016/9/1

Y1 - 2016/9/1

N2 - This manuscript reports temperature- and power-dependence of in-plane E1 2g and out-of-plane A1g Raman modes in a continuous WS2 monolayer film (CWMF) prepared using low pressure chemical vapor deposition (LPCVD), suspended on a perforated substrate. The frequencies of these two phonon modes vary linearly with temperature (77–523 K) and power (2–14 μW), and the modes soften as local temperature increases. The first-order temperature coefficients for E1 2g and A1g modes are 0.0124 and 0.0112 cm−1/K, respectively, and power coefficients are 0.1228 and 0.1381 cm−1/μW. Using the 1D Balandin's approach, we have calculated the thermal conductivity of the suspended CWMF at room temperature to be ca. 20 and 16 W/mK when considering the E1 2g and A1g modes, respectively. Our results provide thermal properties values of CWMF, which are very important for developing monolayer WS2 electronic devices.

AB - This manuscript reports temperature- and power-dependence of in-plane E1 2g and out-of-plane A1g Raman modes in a continuous WS2 monolayer film (CWMF) prepared using low pressure chemical vapor deposition (LPCVD), suspended on a perforated substrate. The frequencies of these two phonon modes vary linearly with temperature (77–523 K) and power (2–14 μW), and the modes soften as local temperature increases. The first-order temperature coefficients for E1 2g and A1g modes are 0.0124 and 0.0112 cm−1/K, respectively, and power coefficients are 0.1228 and 0.1381 cm−1/μW. Using the 1D Balandin's approach, we have calculated the thermal conductivity of the suspended CWMF at room temperature to be ca. 20 and 16 W/mK when considering the E1 2g and A1g modes, respectively. Our results provide thermal properties values of CWMF, which are very important for developing monolayer WS2 electronic devices.

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