Figure 1

Transitions responsible for the (a) association and (b) dissociation of Co dimers. Dark-gray, light-gray, and white represent Cu atoms, Co atoms, and vacancies, respectively.Reuse & Permissions

Figure 2

Transitions responsible for the association of the Co atom to inner atoms of the linear Co chain. Dark-gray, light-gray and white represent Cu atoms, Co atoms, and vacancies, respectively.Reuse & Permissions

Figure 3

Different positions of a single Co atom before association with the linear Co chain. Formation of a linear chain takes place with the probability of $p_1/2$ if the Co monomer is in the A or B positions. Formation of an angular chain takes place with the probability of $p_1/2$ if the Co monomer is in the B position or $p_1$ if the Co monomer is in the C position. If the single Co atom is in the D position it can associate with an inner atom of the chain with probability of ${10}^{-3}{p}_1$ at 400 K. Dark-gray and light-gray represent Cu and Co atoms, respectively; $p_1=9.8\times {10}^{-6}$ at 400 K.Reuse & Permissions

Figure 4

Transitions responsible for the association of the Co atom to inner atoms of the zigzag Co chain. Dark-gray, light-gray, and white represent Cu atoms, Co atoms, and vacancies, respectively.Reuse & Permissions

Figure 5

kMC simulations of surface morphology at the different concentrations of embedded Co atoms: (a) $n_{\text{Co}}=0.0375$ ML, (b) $n_{\text{Co}}=0.1875$ ML. Other parameters of the simulations are the same: $T=400\text{K}$, $n_{\text{vac}}=0.00625$ ML. Dark-gray, light-gray, and white represent Cu atoms, Co atoms, and vacancies, respectively. The area $21.7\times 21.7{\text{nm}}^2$ is demonstrated.Reuse & Permissions