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Spin-polarized VLEED from single-layer MoS2/Au(111): Investigation of spin-orbit-induced effects

  • The influence of spin-orbit interaction on low-energy electron reflection from single-layer MoS2 on Au(111) was studied by VLEED (very-low-energy electron diffraction) [1,2]. The spin-dependent electron reflection was investigated for a wide range of electron incidence angles and kinetic energies. Since the adlayer coverage is about 30%, we studied the Au(111) substrate and a MoS2 bulk sample for comparison. This approach enabled us to distinguish between adlayer and substrate signals. For MoS2/Au(111), we detected a spin asymmetry of the reflected intensities, which shows a characteristic feature with alternating sign in the energy region of a VLEED fine structure [1]. The Au(111) substrate, in contrast, shows qualitatively different spin-asymmetry features, partially with reversed sign compared with MoS2/Au(111). The results of bulk MoS2 confirm that the characteristic feature in the single-layer data originates from MoS2. The influence of the adlayer-substrate interaction on the results will be discussed. [1] Burgbacher et al.,The influence of spin-orbit interaction on low-energy electron reflection from single-layer MoS2 on Au(111) was studied by VLEED (very-low-energy electron diffraction) [1,2]. The spin-dependent electron reflection was investigated for a wide range of electron incidence angles and kinetic energies. Since the adlayer coverage is about 30%, we studied the Au(111) substrate and a MoS2 bulk sample for comparison. This approach enabled us to distinguish between adlayer and substrate signals. For MoS2/Au(111), we detected a spin asymmetry of the reflected intensities, which shows a characteristic feature with alternating sign in the energy region of a VLEED fine structure [1]. The Au(111) substrate, in contrast, shows qualitatively different spin-asymmetry features, partially with reversed sign compared with MoS2/Au(111). The results of bulk MoS2 confirm that the characteristic feature in the single-layer data originates from MoS2. The influence of the adlayer-substrate interaction on the results will be discussed. [1] Burgbacher et al., Phys. Rev. B 87, 195411 (2013) [2] Angrick et al., J. Phys.: Condens. Matter 33, 115001 (2020)show moreshow less

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Author: Christoph AngrickORCiD, Annika Henriksen, Nicole Mutzke, Andre Reimann, Moritz EwertORCiD, Lars BußORCiD, Jens FaltaORCiD, Jan Ingo FlegeORCiD, Markus DonathORCiD
URL:https://www.dpg-verhandlungen.de/year/2021/conference/surfacescience/part/o/session/78/contribution/3
Title of the source (English):Verhandlungen der DPG - SurfaceScience21
Publisher:Deutsche Physikalische Gesellschaft e.V.
Place of publication:Bad Honnef
Document Type:Image (poster)
Language:English
Year of publication:2021
Tag:Molybdenum disulfide (MoS2); spin-orbit interaction; very-low-energy electron diffraction (VLEED)
Volume/Year:2021
Article number:O 78.3
Faculty/Chair:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Angewandte Physik und Halbleiterspektroskopie
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