Nucleation and growth of primary nanostructures in SrTiO3 homoepitaxy

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Title
Nucleation and growth of primary nanostructures in SrTiO3 homoepitaxy
Author(s)
Soo-Hyon Phark; Young Jun Chang
Publication Date
2015-02
Journal
Nanoscale Research Letters, v.10, no.1, pp.80 -
Publisher
SPRINGER
Abstract
SrTiO3 nanoislands on SrTiO3 (001) in a diffusion-limited growth regime were studied using in situ scanning tunneling microscopy (STM). The STM images revealed two characteristic features of nucleation stages. First, the minimum lateral size of the one-unit-cell (uc)-high SrTiO3 islands was 4 x 4 uc(2). Second, one-dimensional SrTiO3 islands of a 4 uc width grew along the crystal symmetry directions. These observations suggest that 4 x 4-uc(2) islands act as a minimum nucleation seed, and the addition of SrTiO3 molecular species of the same width is the primary and dominant growth process in SrTiO3 homoepitaxy. A close inspection of the surface of the substrate during the deposition process revealed possible connections between surface reconstruction and energetically favorable nucleation of SrTiO3 islands. © 2015 Phark and Chang; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
URI
https://pr.ibs.re.kr/handle/8788114/2119
ISSN
1556-276X
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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