Charge-exchange-dependent energy loss of H and He in freestanding monolayers of graphene and MoS2

Charge-exchange-dependent energy loss of H and He in freestanding monolayers of graphene and MoS2

Niggas, A.; Fischer, L.; Kretschmer, S.; Werl, M.; Biber, H.; Speckmann, C.; McEvoy, N.; Kotakoski, J.; Aumayr, F.; Krasheninnikov, A.; Wilhelm, R. A.

Abstract

We study the energy loss of helium and hydrogen ions after transmission through monolayers of graphene and MoS2 and compare experimental results with different computational approaches. We find a systematically higher energy loss in experiments compared to simulations by up to a factor of 2. Additionally, our results show that neutralization processes of the particles increase the kinetic energy loss, a contribution generally not included in any computational approach.

Keywords: Atom or molecule scattering from surfaces; Electronic excitation & ionization; Interatomic & molecular potentials; 2-dimensional systems; Graphene; Ions; Surfaces; Transition metal dichalcogenides; Density functional theory; Ion beam analysis; Ion scattering from surfaces

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  • Zweitveröffentlichung erwartet ab 26.12.2024

Permalink: https://www.hzdr.de/publications/Publ-38408