Adjusting island density and morphology of the SrTiO[subscript 3](110)-(4×1) surface: Pulsed laser deposition combined with scanning tunneling microscopy
Name
Yildiz_Adjusting island.pdf
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3.18 MB
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Checksum (MD5)
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Author(s)
Gerhold, Stefan
Riva, Michele
Yildiz, Bilge
Schmid, Michael
Diebold, Ulrike
Alternative Title
Adjusting island density and morphology of the SrTiO3(110)-(4 × 1) surface: Pulsed laser deposition combined with scanning tunneling microscopy
Date Issued
March 2016
Journal
Surface Science
Publisher
Elsevier
Citation
Stefan, Gerhold, Michele Riva, Bilge Yildiza, Michael Schmida, and Ulrike Diebolda. "Adjusting island density and morphology of the SrTiO3(110)-(4×1) surface: Pulsed laser deposition combined with scanning tunneling microscopy." Surface Science, vol. 651, September 2016, pp. 76-83.
Version
Final published version
Abstract
The first stages of homoepitaxial growth of the (4 × 1) reconstructed surface of SrTiO[subscript 3](110) are probed by a combination of pulsed laser deposition (PLD) with in-situ reflection high energy electron diffraction (RHEED) and scanning tunneling microscopy (STM). Considerations of interfacing high-pressure PLD growth with ultra-high-vacuum surface characterization methods are discussed, and the experimental setup and procedures are described in detail. The relation between RHEED intensity oscillations and ideal layer-by-layer growth is confirmed by analysis of STM images acquired after deposition of sub-monolayer amounts of SrTiO[subscript 3]. For a quantitative agreement between RHEED and STM results one has to take into account two interfaces: the steps at the circumference of islands, as well as the borders between two different reconstruction phases on the islands themselves. Analysis of STM images acquired after one single laser shot reveals an exponential decrease of the island density with increasing substrate temperature. This behavior is also directly visible from the temperature dependence of the relaxation times of the RHEED intensity. Moreover, the aspect ratio of islands changes considerably with temperature. The growth mode depends on the laser pulse repetition rate, and can be tuned from predominantly layer-by-layer to the step-flow growth regime.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.susc.2016.03.010
