標題: Spontaneous orientation-tuning driven by the strain variation in self-assembled ZnO-SrRuO3 heteroepitaxy
作者: Zhu, Yuanmin
Chang, Wei Sea
Yu, Rong
Liu, Ruirui
Wei, Tzu-Chiao
He, Jr-Hau
Chu, Ying-Hao
Zhan, Qian
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 9-Nov-2015
摘要: Heteroepitaxial ZnO and SrRuO3 were grown on SrTiO3 (111) substrates and formed a self-assembled wurtzite-perovskite nanostructure. Spontaneous orientation-tuning of the SrRuO3 pillars was observed, with the growth direction changing from [111](SRO) to [011](SRO) as the film thickness increased, which is attributed to a misfit strain transition from the biaxial strain imposed by the SrTiO3 substrate to the vertical strain provided by the ZnO matrix. The [011]-SrRuO3 and [0001]-ZnO combination presents a favorable matching in the nanocomposite films, resulting in higher charge carrier mobility. This vertically integrated configuration and regulation on the crystallographic orientations are expected to be employed in designing multi-functional nanocomposite systems for applications in electronic devices. (C) 2015 AIP Publishing LLC.
URI: http://dx.doi.org/10.1063/1.4935422
http://hdl.handle.net/11536/129384
ISSN: 0003-6951
DOI: 10.1063/1.4935422
期刊: APPLIED PHYSICS LETTERS
Volume: 107
Issue: 19
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