Studies of step stiffnesses and relaxation on Pt(111), Pd(111) and Mo(011)

被引：7
|
作者：
Ondrejcek, M
Swiech, W
Flynn, CP
机构：
[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA
[2] Univ Illinois, Mat Res Lab, Urbana, IL 61801 USA
来源：
SURFACE SCIENCE | 2004年 / 566卷
关键词：
surface diffusion; low-energy electron microscopy (LEEM); platinum; palladium; molybdenum;
D O I：
10.1016/j.susc.2004.05.038
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：
We describe investigations of equilibrium step structure on Pt(1 1 1), Pd(1 1 1) and Mo(0 1 1), using low energy electron microscopy. From capillary wave analyses we obtained fluctuation amplitudes and relaxation times for Fourier components of the step edge displacement as functions of wave number q. The tau(q)(-1) at similar toT(m)/2 vary quite accurately with wavevector q as q(3) and show that surface diffusion is responsible for the relaxation at these lower temperatures for all clean single crystal surfaces studied. The temperature dependence of the step stiffnesses is very weak in the intervals 1190-1520 K for Pt, 990-1300 K for Pd and 1350-1680 K for Mo. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：160 / 164
页数：5
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