Nonequilibrium free energy and kinetic roughening of steps on the Kossel(001) surface

被引：26
作者：
Cuppen, HM
Meekes, H
van Enckevort, WJP
Vlieg, E
Knops, HJF
机构：
[1] Univ Nijmegen, NSRIM Dept Solid State Chem, NL-6525 ED Nijmegen, Netherlands
[2] Univ Nijmegen, Dept Theoret Phys, NL-6525 ED Nijmegen, Netherlands
来源：
PHYSICAL REVIEW B | 2004年 / 69卷 / 24期
关键词：
D O I：
10.1103/PhysRevB.69.245404
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper studies the nonequilibrium energetics of growth steps. It discusses the energy and free energy of a [100] step on a Kossel(001) crystal surface as a function of the driving force in the case that two-dimensional nucleation is not active. Theoretical expressions for these energies are derived and are found to agree with data obtained from Monte Carlo simulations of step flow. The nonequilibrium expressions allow us to propose that the vanishing of the step free energy beyond a critical value of the driving force defines the onset of the kinetic roughening regime. This is found to agree with the earlier phenomenological criteria for this transition.
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页码：245404 / 1
页数：6
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