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

被引：113

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

页码：276 / 286

页数：11

共 33 条

[1] Composition and structure of the Al2O3 {0001}-(1x1) surface [J].