Preis, Tobias and Vrbica, Sasha and Eroms, Jonathan and Repp, Jascha and van Ruitenbeek, Jan M. (2021) Current-Induced One-Dimensional Diffusion of Co Adatoms on Graphene Nanoribbons. NANO LETTERS, 21 (20). pp. 8794-8799. ISSN 1530-6984, 1530-6992
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One-dimensional diffusion of Co adatoms on graphene nanoribbons has been induced and investigated by means of scanning tunnelling microscopy (STM). To this end, the nanoribbons and the Co adatoms have been imaged before and after injecting current pulses into the nanoribbons, with the STM tip in direct contact with the ribbon. We observe current-induced motion of the Co atoms along the nanoribbons, which is approximately described by a distribution expected for a thermally activated one-dimensional random walk. This indicates that the nanoribbons reach temperatures far beyond 100 K, which is well above the temperature of the underlying Au substrate. This model system can be developed further for the study of electromigration at the single-atom level.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | adatom diffusion; graphene nanoribbons; scanning tunneling microscopy; electromigration |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Jascha Repp Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Jonathan Eroms |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Aug 2022 05:06 |
| Last Modified: | 26 Aug 2022 05:06 |
| URI: | https://pred.uni-regensburg.de/id/eprint/46994 |
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