Surface structure of MBE-grown α-Fe2O3(0001) by intermediate-energy X-ray photoelectron diffraction

被引：111
|
作者：
Thevuthasan, S
Kim, YJ
Yi, SI
Chambers, SA
Morais, J
Denecke, R
Fadley, CS
Liu, P
Kendelewicz, T
Brown, GE
机构：
[1] Pacific NW Lab, Environm Mol Sci Lab, Richland, WA 99352 USA
[2] Lawrence Berkeley Lab, Berkeley, CA 94720 USA
[3] Stanford Univ, Dept Environm & Geol Sci, Stanford, CA 94305 USA
[4] Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA
来源：
SURFACE SCIENCE | 1999年 / 425卷 / 2-3期
关键词：
photoelectron diffraction; molecular beam epitaxy; X-ray photoelectron spectroscopy; surface structure; iron oxide; low index single crystal surfaces;
D O I：
10.1016/S0039-6028(99)00200-9
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：
We have used intermediate-energy X-ray photoelectron diffraction to determine the surface structure of epitaxial alpha-Fe2O3(0001) grown on alpha-Al2O3(0001). Comparison of experiment with quantum mechanical scattering theory reveals that the surface is Fe-terminated, and that the first four layer spacings are -41, +18, -8, and 47% of the associated bulk values, respectively. These results agree reasonably well with the predictions of molecular mechanics and spin-density functional theory previously reported in the literature for the Fe-terminated surface. However, we find no evidence for an O-terminated surface predicted to be stable by spin-density functional theory. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：276 / 286
页数：11
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