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Unraveling the growth mechanism of single-domain molybdenum disulfide on Au(111)

  • As a transition metal dichalcogenide single-layer molybdenum disulfide (MoS2) is a heavily investigated system. Due to its direct band gap, the electronic properties of single-layer MoS2 have been subject to several surface science methods. A well-known model system is MoS2 on Au(111). We present in situ low-energy electron microscopy (LEEM) and micro-diffraction (LEED) observations of MoS2 growth on Au(111) at elevated temperature using two distinctly different deposition rates. Our investigations reveal similar but different expansion mechanisms of the MoS2 islands changing a balanced distribution of the two mirror domains towards a single domain distribution. Structural characterization by I(V)-LEEM and investigations of the electronic bandstructure using angle-resolved photoelectron spectroscopy both confirm single-layer nature of the MoS2 islands. We could identify step pushing of the growing MoS2 being responsible for this phenomena.

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Author: Moritz EwertORCiD, Lars BußORCiD, Paolo MorasORCiD, Jens FaltaORCiD, Jan Ingo FlegeORCiD
URL:https://www.dpg-verhandlungen.de/year/2019/conference/regensburg/part/o/session/35/contribution/6
ISSN:0420-0195
Title of the source (German):Verhandlungen der DPG
Publisher:Deutsche Physikalische Gesellschaft
Place of publication:Bad Honnef
Document Type:Conference publication not peer-reviewed
Language:English
Year of publication:2019
Tag:I(V)-LEEM; investigations of the electronic bandstructure using angle-resolved photoelectron spectroscopy; low-energy electron microscopy (LEEM); micro-diffraction (LEED)
First Page:329
Last Page:329
Series ; volume number:Verhandlungen der DPG (VI) ; 54,4
Faculty/Chair:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Angewandte Physik und Halbleiterspektroskopie
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