STABILITY AND KINETICS OF STEP MOTION ON CRYSTAL-SURFACES

被引:98
作者
LIU, F
METIU, H
机构
[1] UNIV CALIF SANTA BARBARA,DEPT CHEM,SANTA BARBARA,CA 93106
[2] UNIV CALIF SANTA BARBARA,CTR QUANTIZED ELECTR STRUCT,SANTA BARBARA,CA 93106
来源
PHYSICAL REVIEW E | 1994年 / 49卷 / 04期
关键词
D O I
10.1103/PhysRevE.49.2601
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
The kinetics of monoatomic steps in diffusion-controlled crystal growth and evaporation processes are investigated analytically using a Green's function approach. Integro-differential equations of motion for the steps are derived; a systematic linear stability analysis is carried out treating simultaneously perturbations both along and perpendicular to the steps. Morphological fluctuations of steadily moving steps in response to ambient thermodynamic noises are also studied within a general Langevin formalism. Finally, a phase field model is developed to investigate the time-dependent, collective motion of steps. An application of the model to a finite step train recovers a variety of kinetic behaviors such as the bunching and spreading of steps.
引用
收藏
页码:2601 / 2616
页数:16
相关论文
共 47 条