Low-energy electron diffraction study of the thermal expansion of Ag(111)

被引：30
作者：
Soares, EA
Leatherman, GS
Diehl, RD
Van Hove, MA
机构：
[1] Penn State Univ, Dept Phys, University Pk, PA 16802 USA
[2] Lawrence Berkeley Lab, Mat Sci Div, Berkeley, CA 94720 USA
[3] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA
来源：
SURFACE SCIENCE | 2000年 / 468卷 / 1-3期
基金：
美国国家科学基金会;
关键词：
low energy electron diffraction (LEED); silver;
D O I：
10.1016/S0039-6028(00)00806-2
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：
The temperature dependence of the first three interlayer distances of the Ag(lll) surface was studied by low-energy electron diffraction (LEED) over the temperature range 128-723 K. The first three interlayer spacings and the effective Debye temperatures were extracted from the LEED analysis. At the lowest temperature, the first two interlayer spacings are slightly (0.5%) contracted. All three interlayer spacings increase with temperature. finally reaching expansions relative to the bulk of about 0.8% at the highest temperature studied. The effective surface Debye temperature is lowest for the outermost layer, increasing toward the bulk value for successive layers. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：129 / 136
页数：8
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