GEOMETRIC STRUCTURE OF P(2X2)-S/CU(001) DETERMINED BY MEDIUM-ENERGY ION-SCATTERING

被引:23
作者
JIANG, QT [1 ]
FENTER, P [1 ]
GUSTAFSSON, T [1 ]
机构
[1] RUTGERS STATE UNIV,SURFACE MODIFICAT LAB,PISCATAWAY,NJ 08855
来源
PHYSICAL REVIEW B | 1990年 / 42卷 / 15期
关键词
D O I
10.1103/PhysRevB.42.9291
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have determined the geometric structure of the p(2×2)-S/Cu(001) surface with medium-energy ion scattering. There are qualitative features in our data that clearly show that sulfur adsorption does not induce large atomic rearrangements of the Cu substrate. A detailed analysis based on Monte Carlo simulations shows that the sulfur atoms are located 1.30 above the copper surface. The first Cu layer moves outwards by 0.02, and the top-layer Cu atoms move laterally away from the adsorbate by 0.03. This results in a S-Cu bond length of 2.25. Our results are compared with earlier contradictory results on this controversial system. We find excellent agreement with a recent low-energy electron diffraction study. © 1990 The American Physical Society.
引用
收藏
页码:9291 / 9298
页数:8
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