摘要
MonteCarlo方法模拟了在非均质基底表面上团簇的生长过程.非均质基底由规则分布的A,B两类不同性质的物质(不同材料、不同温度等)组成.沉积粒子的初动能为E0,在不同相基底上单位长度扩散的能耗为EA,EB,粒子从A经过相界扩散到B的能耗为EAB.模拟中粒子的初动能E0.远大于EA,EB,粒子从B过相界到A能耗EBA取为0.结果表明,沉积在此类基底表面的粒子凝聚成具有分形结构的团簇.当EAB远大于EA,EB时,团簇的数目、团簇的回旋半径、团簇的分形维数均随E0/EAB呈周期性变化.
The growth of clusters on an inhomogeneous substrate is simulated by using Monte Carlo method. The inhomogeneous substrate is composed of two different kinds of regularly distributed materials A and B with different physical properties. Deposited particles have initial energy E0. It consumes energies EA and EB when a particle diffuses one step on phases A and B, respectively, and it consumes energy EAB when the particle passes through the phase boundary from A to B. In the simulation, Eo is much bigger than EA and EB , and the energy needed for the particle to pass through the phase boundary from B to A is set as EBA = 0. Results show that the clusters aggregated on the inhomogeneous substrate are of fractal structure. When EAB is much bigger than EA and EB, the number, radius of gyration and fractal dimension of the cluster all vary periodically with ratio Eo/EBA.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第9期4460-4465,共6页
Acta Physica Sinica
基金
浙江省自然科学基金(批准号:Y405406)资助的课题.~~
