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Crystal Research and Technology |
Cryst. Res. Technol. 38,
896 (2003) - Abstract -
Structure and chemical composition of LiB3O5 surfaces
V. V. Atuchin, V. G. Kesler, I. A. Lisova*, L. D. Pokrovsky, N. A. Pylneva*, and A. M. Yurkin*
Institute of Semiconductor Physics, 630090, Novosibirsk 90, Russia
*Institute of Mineralogy and Petrography, 630090, Novosibirsk 90, Russia
| Keywords | lithium triborate, surface, polishing, crystal structure, chemical composition |
| PACS | 42.70.Mp, 61.14.Hg, 81.65.Cf, 82.80.Pv |
| DOI | 10.1002/crat.200310109 |
The electronic and structural properties of LiB3O5 (LBO) surfaces have been studied by X-ray photoemission spectroscopy (XPS) and reflectance high-energy electron diffraction (RHEED). The as-grown (110) crystal face and mechanically polished (001) surfaces have been investigated comparatively. Electronic structure of LBO has been determined on as-grown (110) crystal face previously cleaned by chemical etching with RHEED control. The correlation of valence band structure and measured binding energies with earlier reported results has been discussed. Core-level spectroscopy reveals strong enriching of mechanically polished LBO surface with carbon, when nanodiamond powder is used as an abrasive. So high carbon level as C:B=0.7 has been observed at the surface while the ratio Li:B:O remains according to LBO chemical composition. The association of LBO Kikuchi-lines with strong background has been shown by RHEED analysis of the surface. Thus, the polished LBO surface constitutes a high structure quality LBO with the inclusions of some amorphous carbon compound.
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