HYDROGEN-INDUCED MISSING-ROW RECONSTRUCTION OF FE(211)

被引：15

作者：

HASSOLD, E ^{[1
]}

LOFFLER, U ^{[1
]}

SCHMIEDL, R ^{[1
]}

GRUND, M ^{[1
]}

HAMMER, L ^{[1
]}

HEINZ, K ^{[1
]}

MULLER, K ^{[1
]}

机构：

[1] UNIV ERLANGEN NURNBERG,LEHRSTUHL FESTKORPERPHYS,D-91058 ERLANGEN,GERMANY

来源：

SURFACE SCIENCE | 1995年 / 326卷 / 1-2期

关键词：

D O I：

10.1016/0039-6028(94)00772-1

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 present quantitative structure determinations by tow energy electron diffraction of both the clean Fe(211) phase and a drastic (1 x 2) reconstruction induced by hydrogen under thermal activation. For the clean surface we find a registry shift between the first two atomic layers and an oscillatory multilayer relaxation in agreement with earlier work. The reconstructed (1 X 2) phase is shown to be of the missing row type, whereby every second close packed atomic row is removed. The Pendry R-factors, R = 0.16 and 0.19 for the clean and reconstructed surface respectively, are convincingly low. Additionally, the missing row reconstruction accounts quantitatively for the observed brightness of extra diffraction spots. The removal of atomic rows entails considerable movements of second and third layer iron atoms, i.e. pairing and buckling.

引用

页码：93 / 100

页数：8

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