The role of electron-phonon interactions on the coherence lifetime of monolayer transition metal dichalcogenides

C. E. Stevens, P. Dey, J. Paul, Z. Wang, H. Zhang, A. H. Romero, J. Shan, D. J. Hilton, D. Karaiskaj

Research output: Contribution to journalConference article

Abstract

We investigate the excitonic dephasing of transition metal dichalcogenides, namely MoS2, MoSe2 and WSe2 atomic monolayer thick and bulk crystals, in order to understand the factors that determine the optical coherence in these materials. Coherent nonlinear optical spectroscopy, temperature dependent absorption combined with theoretical calculations of the phonon spectra, reveal the important role electron-phonon interactions plat in dephasing process. The temperature dependence of the electronic band gap and the excitonic linewidth combined with 'ab initio' calculations of the phonon energies and the phonon density of state reveal strong interaction with the E' and E" phonon modes.

Original languageEnglish (US)
Article number012035
JournalJournal of Physics: Conference Series
Volume864
Issue number1
DOIs
StatePublished - Aug 15 2017
Event33rd International Conference on the Physics of Semiconductors, ICPS 2016 - Beijing, China
Duration: Jul 31 2016Aug 5 2016

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electron phonon interactions
transition metals
life (durability)
temperature dependence
electronics
spectroscopy
crystals
temperature
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Stevens, C. E. ; Dey, P. ; Paul, J. ; Wang, Z. ; Zhang, H. ; Romero, A. H. ; Shan, J. ; Hilton, D. J. ; Karaiskaj, D. / The role of electron-phonon interactions on the coherence lifetime of monolayer transition metal dichalcogenides. In: Journal of Physics: Conference Series. 2017 ; Vol. 864, No. 1.
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abstract = "We investigate the excitonic dephasing of transition metal dichalcogenides, namely MoS2, MoSe2 and WSe2 atomic monolayer thick and bulk crystals, in order to understand the factors that determine the optical coherence in these materials. Coherent nonlinear optical spectroscopy, temperature dependent absorption combined with theoretical calculations of the phonon spectra, reveal the important role electron-phonon interactions plat in dephasing process. The temperature dependence of the electronic band gap and the excitonic linewidth combined with 'ab initio' calculations of the phonon energies and the phonon density of state reveal strong interaction with the E' and E{"} phonon modes.",
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Stevens, CE, Dey, P, Paul, J, Wang, Z, Zhang, H, Romero, AH, Shan, J, Hilton, DJ & Karaiskaj, D 2017, 'The role of electron-phonon interactions on the coherence lifetime of monolayer transition metal dichalcogenides', Journal of Physics: Conference Series, vol. 864, no. 1, 012035. https://doi.org/10.1088/1742-6596/864/1/012035

The role of electron-phonon interactions on the coherence lifetime of monolayer transition metal dichalcogenides. / Stevens, C. E.; Dey, P.; Paul, J.; Wang, Z.; Zhang, H.; Romero, A. H.; Shan, J.; Hilton, D. J.; Karaiskaj, D.

In: Journal of Physics: Conference Series, Vol. 864, No. 1, 012035, 15.08.2017.

Research output: Contribution to journalConference article

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T1 - The role of electron-phonon interactions on the coherence lifetime of monolayer transition metal dichalcogenides

AU - Stevens, C. E.

AU - Dey, P.

AU - Paul, J.

AU - Wang, Z.

AU - Zhang, H.

AU - Romero, A. H.

AU - Shan, J.

AU - Hilton, D. J.

AU - Karaiskaj, D.

PY - 2017/8/15

Y1 - 2017/8/15

N2 - We investigate the excitonic dephasing of transition metal dichalcogenides, namely MoS2, MoSe2 and WSe2 atomic monolayer thick and bulk crystals, in order to understand the factors that determine the optical coherence in these materials. Coherent nonlinear optical spectroscopy, temperature dependent absorption combined with theoretical calculations of the phonon spectra, reveal the important role electron-phonon interactions plat in dephasing process. The temperature dependence of the electronic band gap and the excitonic linewidth combined with 'ab initio' calculations of the phonon energies and the phonon density of state reveal strong interaction with the E' and E" phonon modes.

AB - We investigate the excitonic dephasing of transition metal dichalcogenides, namely MoS2, MoSe2 and WSe2 atomic monolayer thick and bulk crystals, in order to understand the factors that determine the optical coherence in these materials. Coherent nonlinear optical spectroscopy, temperature dependent absorption combined with theoretical calculations of the phonon spectra, reveal the important role electron-phonon interactions plat in dephasing process. The temperature dependence of the electronic band gap and the excitonic linewidth combined with 'ab initio' calculations of the phonon energies and the phonon density of state reveal strong interaction with the E' and E" phonon modes.

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