THE DIFFUSION-COEFFICIENT BEYOND TST AND JUMP THEORY

被引：7
|
作者：
FERRANDO, R [1 ]
SPADACINI, R [1 ]
TOMMEI, GE [1 ]
机构：
[1] CNR, CTR FIS SUPERFICI & BASSE TEMP, I-16146 GENOA, ITALY
来源：
SURFACE SCIENCE | 1993年 / 287卷
关键词：
D O I：
10.1016/0039-6028(93)91093-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Jump theory (JT) and transition state theory (TST) are usually employed to study atom diffusion at crystal surfaces. In the Fokker-Planck (FP) approach the continuous motion of the diffusing particle and the non-equilibrium effects are incorporated in a natural way; JT and TST results are obtained as limiting cases in certain ranges of the parameters. High-temperature and low-friction effects are studied solving the FP equation with a periodic adiabatic potential and a position-dependent friction.
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页码：886 / 890
页数：5
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