Surface and bulk reconstruction of Pt(111) 1x1

被引：17
|
作者：
Gallego, S [1 ]
Ocal, C [1 ]
Soria, F [1 ]
机构：
[1] UNIV AUTONOMA MADRID,DEPT FIS MAT CONDENSADA,E-28049 MADRID,SPAIN
来源：
SURFACE SCIENCE | 1997年 / 377卷 / 1-3期
关键词：
electron-solid interactions; scattering; diffraction; low energy electron diffraction (LEED); low index single crystal surfaces; platinum; surface relaxation and reconstruction; surface stress; surface structure; morphology; roughness and topography;
D O I：
10.1016/S0039-6028(96)01320-9
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：
A new structural analysis of the Pt(lll) 1 x 1 surface by low energy electron diffraction gives an unexpected lattice parameter compression of a(0)=3.904 Angstrom with respect to the crystallographic value of 3.924 A. yielding a Pendry R-factor of 0.078. This implies a 0.5% contraction for both the in-plane lattice parameter, a(p)=2.761 Angstrom, and bulk vertical interplanar distances, d(b)=2.25 Angstrom, as compared to the crystallographic values of 2.775 and 2.265 Angstrom, respectively. The topmost surface layer exhibits an expansion of 0.9%, 2.285 Angstrom, and the second a contraction of 0.9%, 2.245 Angstrom. Deeper layers are bulk layers.
引用
收藏
页码：18 / 22
页数：5
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