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Spontaneous orientation-tuning driven by the strain variation in self-assembled ZnO-SrRuO3 heteroepitaxy

Authors :
Tzu Chiao Wei
Yuanmin Zhu
Ying-Hao Chu
Jr-Hau He
Wei Sea Chang
Rong Yu
Qian Zhan
Ruirui Liu
Source :
Applied Physics Letters. 107:191902
Publication Year :
2015
Publisher :
AIP Publishing, 2015.

Abstract

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.

Details

ISSN :
10773118 and 00036951
Volume :
107
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........180711d0386cb23dd412f676124415fa
Full Text :
https://doi.org/10.1063/1.4935422