LEED CRYSTALLOGRAPHIC INVESTIGATION OF ULTRATHIN FILMS FORMED BY DEPOSITION OF SN ON THE PT(111) SURFACE

被引：43
|
作者：
ATREI, A [1 ]
BARDI, U [1 ]
WU, JX [1 ]
ZANAZZI, E [1 ]
ROVIDA, G [1 ]
机构：
[1] UNIV SCI & TECHNOL CHINA,ACAD SINICA,STRUCT RES LAB,HEFEI,PEOPLES R CHINA
来源：
SURFACE SCIENCE | 1993年 / 290卷 / 03期
关键词：
D O I：
10.1016/0039-6028(93)90712-S
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：
Deposition of Sn on the Pt(111) surface followed by annealing at 1000 K leads to the formation of ordered phases showing (2 x 2) and (square-root 3 x square-root 3)R30-degrees LEED patterns, depending on the surface coverage of Sn. Both these phases were studied by LEED dynamical analysis. The best agreement between experimental and calculated I-V curves was obtained by means of models based on the formation of mixed Pt-Sn layers on the surface where Pt and Sn atoms are nearly coplanar with a slight upward buckling of Sn atoms. The structures of these phases are similar to those already observed for the Pt3Sn(111) surface.
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页码：286 / 294
页数：9
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