Chemistry Reference
In-Depth Information
Fig. 6.9
The interface energy dependence on Monte Carlo time. After formation a constant width
stripes I (data from [
4
]) or alloyed islands II, the energy fluctuates close to a constant value
Fig. 6.10
Time evolution of Pb adatoms diffusion across atomic steps inside the Cu(111) terrace.
After penetration in depth of three- to four-atomic Cu rows of both sides of the terrace, the Pb
atoms migration is completely blocked. Surface alloying is avoided on a flat, step-free surface area
(from Michailov [
4
], Copyright
c
2009 The American Physical Society)
Time evolution analysis of the stripe width, Fig.
6.10
, suggests a gradual increase
of diffusion energy barriers in the direction toward the terrace center. The simulation
results reveal diffusion coefficient (for migration across the step) dependent on the
position of the terrace atomic row in direction to the center, Fig.
6.8
. Following the
general expression for diffusion coefficient
D
i
:
