A scanning tunneling microscopy, X-ray photoelectron spectroscopy and low-energy electron diffraction investigation of the BaTiO3(111) surface

Authors
Hagendorf, C Schindler, KM Doege, T Neddermeyer, H
Citation
C. Hagendorf et al., A scanning tunneling microscopy, X-ray photoelectron spectroscopy and low-energy electron diffraction investigation of the BaTiO3(111) surface, SURF SCI, 436(1-3), 1999, pp. 121-130
Citations number
41
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
SURFACE SCIENCE
ISSN journal
00396028 → ACNP
Volume
436
Issue
1-3
Year of publication
1999
Pages
121 - 130
Database
ISI
SICI code
0039-6028(19990810)436:1-3<121:ASTMXP>2.0.ZU;2-3
Abstract
The BaTiO3(111) surface was investigated with scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS) and low-energy electron diff raction (LEED). Annealing in vacuum leads to (root 3 x root 3)R30 degrees, (2 x 2), (3 x 3) and (4 x 4) superstructures, as observed with LEED and STM . The (root 3 x root 3)R30 degrees and the (n x n) reconstructions are foun d to be related to the two different surface terminations. STM investigatio ns show that annealing in oxygen produces a dense overlayer of nanometer-si zed islands. XPS investigations indicate that these islands are Pa rich com pared with the bulk stoichiometry. (C) 1999 Published by Elsevier Science B .V. All rights reserved.