Projects per year
Abstract
We compare the ion-induced electron emission from freestanding monolayers of graphene and MoS2 to find a sixfold higher number of emitted electrons for graphene even though both materials have similar work functions. An effective single-band Hubbard model explains this finding by a charge-up in MoS2 that prevents low energy electrons from escaping the surface within a period of a few femtoseconds after ion impact. We support these results by measuring the electron energy distribution for correlated pairs of electrons and transmitted ions. The majority of emitted primary electrons have an energy below 10 eV and are therefore subject to the dynamic charge-up effects at surfaces.
Original language | English |
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Article number | 086802 |
Number of pages | 9 |
Journal | Physical Review Letters |
Volume | 129 |
Issue number | 8 |
DOIs | |
Publication status | Published - 19 Aug 2022 |
Austrian Fields of Science 2012
- 103018 Materials physics
- 103042 Electron microscopy
Projects
- 4 Finished
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Atomic control over 2D materials via ion beam manipulation
1/10/18 → 30/09/22
Project: Research funding
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