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  Electron-phonon coupling in single-layer MoS2

Mahatha, S. K., Ngankeu, A. S., Hinsche, N. F., Mertig, I., Guilloy, K., Matzen, P. L., et al. (2019). Electron-phonon coupling in single-layer MoS2. Surface Science, 681, 64-69. doi:10.1016/j.susc.2018.11.012.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0009-0CC0-1 Version Permalink: https://hdl.handle.net/21.11116/0000-0009-4FDD-7
Genre: Journal Article

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1-s2.0-S0039602818308082-main.pdf (Publisher version), 510KB
 
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https://doi.org/10.1016/j.susc.2018.11.012 (Publisher version)
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https://arxiv.org/abs/1811.07297 (Preprint)
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 Creators:
Mahatha, Sanjoy K.1, Author
Ngankeu, Arlette S.1, Author
Hinsche, Nicki Fran1, Author
Mertig, Ingrid2, Author
Guilloy, Kevin1, Author
Matzen, Peter L.1, Author
Bianchi, Marco1, Author
Sanders, Charlotte1, Author
Miwa, Jill A.1, Author
Bana, Harsh1, Author
Travaglia, Elisabetta1, Author
Lacovig, Paolo1, Author
Bignardi, Luca1, Author
Lizzit, Daniel1, Author
Larciprete, Rosanna1, Author
Baraldi, Alessandro1, Author
Lizzit, Silvan1, Author
Hofmann, Philip1, Author
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1External Organizations, ou_persistent22              
2Max Planck Institute of Microstructure Physics, Max Planck Society, Weinberg 2, 06120 Halle, DE, ou_2415691              

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 Abstract: The electron-phonon coupling strength in the spin-split valence band maximum of single-layer MoS2 is studied using angle-resolved photoemission spectroscopy and density functional theory-based calculations. Values of the electron-phonon coupling parameter λ are obtained by measuring the linewidth of the spin-split bands as a function of temperature and fitting the data points using a Debye model. The experimental values of λ for the upper and lower spin-split bands at K are found to be 0.05 and 0.32, respectively, in excellent agreement with the calculated values for a free-standing single-layer MoS2. The results are discussed in the context of spin and phase-space restricted scattering channels, as reported earlier for single-layer WS2 on Au(111). The fact that the absolute valence band maximum in single-layer MoS2 at K is almost degenerate with the local valence band maximum at Γ can potentially be used to tune the strength of the electron-phonon interaction in this material.

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 Dates: 2018-11-222019-03
 Publication Status: Issued
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 Identifiers: BibTex Citekey: P13759
DOI: 10.1016/j.susc.2018.11.012
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Title: Surface Science
  Abbreviation : Surf. Sci.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 681 Sequence Number: - Start / End Page: 64 - 69 Identifier: ISSN: 0039-6028
CoNE: https://pure.mpg.de/cone/journals/resource/0039-6028