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@ARTICLE{Xu:824618,
author = {Xu, Chencheng and Du, Hongchu and van der Torren, Alexander
J. H. and Aarts, Jan and Jia, Chun-Lin and Dittmann, Regina},
title = {{F}ormation mechanism of {R}uddlesden-{P}opper-type
antiphase boundaries during the kinetically limited growth
of {S}r rich {S}r{T}i{O}$_{3}$ thin films},
journal = {Scientific reports},
volume = {6},
issn = {2045-2322},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2016-07181},
pages = {38296 -},
year = {2016},
abstract = {We elucidated the formation process for
Ruddlesden-Popper-type defects during pulsed laser
deposition of Sr rich SrTiO3 thin films by a combined
analysis of in-situ atomic force microscopy, low energy
electron diffraction and high resolution scanning
transmission electron microscopy. At the early growth stage
of 1.5 unit cells, the excess Sr results in the formation of
SrO on the surface, resulting in a local termination change
from TiO2 to SrO, thereby forming a Sr rich (2 × 2)
surface reconstruction. With progressive SrTiO3 growth,
islands with thermodynamically stable SrO rock-salt
structure are formed, coexisting with TiO2 terminated
islands. During the overgrowth of these thermodynamically
stable islands, both lateral as well as vertical
Ruddlesden-Popper-type anti-phase boundaries are formed,
accommodating the Sr excess of the SrTiO3 film. We suggest
the formation of thermodynamically stable SrO rock-salt
structures as origin for the formation of
Ruddlesden-Popper-type antiphase boundaries, which are as a
result of kinetic limitations confined to certain regions on
the surface.},
cin = {PGI-7 / PGI-5},
ddc = {000},
cid = {I:(DE-Juel1)PGI-7-20110106 / I:(DE-Juel1)PGI-5-20110106},
pnm = {521 - Controlling Electron Charge-Based Phenomena
(POF3-521)},
pid = {G:(DE-HGF)POF3-521},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000389370600002},
doi = {10.1038/srep38296},
url = {https://juser.fz-juelich.de/record/824618},
}