SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 5: Focus Session: Ion Beam Interaction with Surfaces and 2D Materials I
O 5.6: Vortrag
Montag, 27. März 2023, 12:15–12:30, GER 38
Influence of the swift heavy ions’ charge state on pore creation in single-layer MoS2 — •Yossarian Liebsch1, Lukas Madauß1, Henning Lebius2, Abdenacer Benyagoub2, Clara Grygiel2, Radia Rahali2, Rajendra Singh3, Jani Kotakoski3, and Marika Schleberger1 — 1University Duisburg-Essen, Duisburg, Germany — 2CIMAP/GANIL, Caen, France — 3University Vienna, Vienna, Austria
The initial charge state of a swift heavy ion is usually of no special interest when discussing the interaction of the ion with a bulk target. This is due to the potential energy being small in comparison to the kinetic energy of the ion and due to the equilibrium charge the ion accumulates within a few nanometers after it enters the material. However, in single-layer materials the travelling distance is less than the typical distance needed to establish the equilibrium charge state. Hence, we try to investigate the influence of the charge state of the ions on the defect formation in MoS2. This is done by irradiating single-layers with swift heavy ions of different charge states. For this experiment we chose 6.6 MeV/u Xe ions with charge states ranging from +41 to +48. Evaluation of the effect on the material is done by analyzing the pore radii and creation efficiencies with STEM-HAADF. With this experiment we aim to shed light onto the fundamental processes and interactions between ultra thin materials and swift heavy ions as well as quantifying the influence of the charge state on the stopping power in single-layered materials.