Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
56 (1990), S. 1847-1849
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
A p(2×2)surface reconstruction is observed over the 800–900 °C range for SrTiO3 (100), the temperature range which is used in the oxygen anneal of Y, Ba, Cu layers on SrTiO3 (100) substrates in the synthesis of high Tc superconducting thin films. As observed by Auger electron spectroscopy, high-temperature annealing causes calcium to segregate to the surface. Initially, at a Ca content of 3% upon a SrO-terminated SrTiO3 (100) surface, the Ca atom is incorporated in a superstructure, which is attributed to multiple scattering across the two topmost interfaces. When the surface Ca content is below 1% the p(2×2) surface reconstruction is induced. The p(2×2) surface reconstruction disappears when the calcium content is removed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.103223
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