Characterization of cleaved surfaces of a monophosphate tungsten bronze

被引：0
作者：
Guyot, H
Motta, N
Placidi, E
Balaska, H
机构：
[1] CNRS, LEPES, F-38240 Meylan, France
[2] Univ Rome, Dipartimento Fis, I-00146 Rome, Italy
[3] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy
[4] Univ Skikda, Skikda, Algeria
来源：
REVIEWS ON ADVANCED MATERIALS SCIENCE | 2004年 / 8卷 / 01期
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D O I：
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中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
[001] surfaces of P4W8O32 obtained by cleavage in UHV are analyzed at room temperature by UPS, LEED and STM. Two types of facets are revealed. The type I shows periodic parameters very close to the parameters of the bulk unit cell. It corresponds to a relaxed (1x1) surface, and the surface defects may produce a (3x1) reconstruction. The type II facets show a periodicity of 7.45 E, that is the distance between two second neighboring tungsten sites and corresponds to facets parallel (001), the dense planes of the perovskite-like WO6 octahedra slabs. This parameter reflects also the width of the steps ending the WO6 octahedra slabs.
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页码：101 / 106
页数：6
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