Nucleation and growth of primary nanostructures in SrTiO3 homoepitaxy [dataset]

Soo-hyon Phark, Young Jun Chang
2016 nano Online   unpublished
SrTiO 3 nanoislands on SrTiO 3 (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 SrTiO 3 islands was 4 × 4 uc 2 . Second, one-dimensional SrTiO 3 islands of a 4 uc width grew along the crystal symmetry directions. These observations suggest that 4 × 4-uc 2 islands act as a minimum nucleation seed, and
more » ... addition of SrTiO 3 molecular species of the same width is the primary and dominant growth process in SrTiO 3 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 SrTiO 3 islands.
doi:10.1515/nano.11671_2015.156 fatcat:7cinitswljfdhfwlo3ihcb5udq