https://doi.org/10.1140/epjb/s10051-022-00426-6
Regular Article - Computational Methods
Two growth modes of nanostructures near Cu(111) step edges in CoCu and PtCu surface alloys
1
Faculty of Physics, Lomonosov Moscow State University, 119991, Moscow, Russian Federation
2
A.M. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Pyzhevsky per., 3, 119017, Moscow, Russia
a
dokukin.sergey@physics.msu.ru
Received:
31
May
2022
Accepted:
20
September
2022
Published online:
29
September
2022
The formation of CoCu and PtCu alloys on the stepped Cu(111) substrate was simulated. Dendritic and finger-like protrusions grow near the edges of the steps. The shape and the internal structure of the protrusions depend on the type of the step edge, temperature and concentrations of impurity atoms. The internal structure and the shape of the protrusions are significantly different in PtCu and CoCu alloys. Pt atoms tend to be surrounded by Cu atoms and Co atoms tend to combine into Co backbones. The dendritic protrusions usually grow at 200 K and the finger-like protrusions usually grow at 300 K. The shape of the protrusions also depends on the type of the step edge and the concentration of impurity atoms. The main differences of PtCu and CoCu protrusions can be explained by the values of the diffusion barriers of the key processes.
Supplementary Information The online version contains supplementary material available at https://doi.org/10.1140/epjb/s10051-022-00426-6.
Copyright comment Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
