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Engineering single-atom dynamics with electron irradiation

Author(s)
Su, Cong; Tripathi, Mukesh; Yan, Qing-Bo; Wang, Zegao; Zhang, Zihan; Hofer, Christoph; Wang, Haozhe; Basile, Leonardo; Su, Gang; Dong, Mingdong; Meyer, Jannik C.; Kotakoski, Jani; Kong, Jing; Idrobo, Juan-Carlos; Susi, Toma; Li, Ju; ... Show more Show less
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Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/
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Abstract
Atomic engineering is envisioned to involve selectively inducing the desired dynamics of single atoms and combining these steps for larger-scale assemblies. Here, we focus on the first part by surveying the single-step dynamics of graphene dopants, primarily phosphorus, caused by electron irradiation both in experiment and simulation, and develop a theory for describing the probabilities of competing configurational outcomes depending on the postcollision momentum vector of the primary knock-on atom. The predicted branching ratio of configurational transformations agrees well with our atomically resolved experiments. This suggests a way for biasing the dynamics toward desired outcomes, paving the road for designing and further upscaling atomic engineering using electron irradiation.
Date issued
2019-05
URI
https://hdl.handle.net/1721.1/121584
Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering; Massachusetts Institute of Technology. Department of Materials Science and Engineering; Massachusetts Institute of Technology. Research Laboratory of Electronics; Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Journal
Applied Physics
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Cong, Su et al. "Engineering single-atom dynamics with electron irradiation." Applied Physics 5, 5 (May 2019): eaav2252 © 2019 The Authors
Version: Final published version
ISSN
2375-2548

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