Journal
SURFACE AND INTERFACE ANALYSIS
Volume 35, Issue 12, Pages 998-1003Publisher
WILEY
DOI: 10.1002/sia.1638
Keywords
strontium titanate; metastable impact electron spectroscopy (MIES); UPS; STM; AFM; ab initio calculations
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The electronic structure of heated SrTiO3(110) surfaces was investigated with metastable impact electron spectroscopy and ultraviolet photoelectron spectroscopy (He(l)). Scanning tunnelling microscopy and atomic force microscopy (AFM) were used to study the topology of the surface. The crystals were heated up to 1000degreesC under reducing conditions in ultrahigh vacuum or under oxidizing conditions in synthetic air for I h, respectively. Under both conditions microfacetting of the surface is observed. The experimental results are compared with ab initio Hartree-Fock calculations, also presented here, carried out for both ideal and reconstructed SrTiO3(110) surfaces. The results give direct evidence for Ti termination of the faceted TiO2 rows. Copyright (C) 2003 John Wiley Sons, Ltd.
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