Open AccessSpontaneous orientation-tuning driven by the strain variation in self-assembled ZnO-SrRuO3 heteroepitaxy
Author(s) -
Yuanmin Zhu,
Wei Sea Chang,
Rong Yu,
Ruirui Liu,
Tzu-Chiao Wei,
JrHau He,
YingHao Chu,
Qian Zhan
Publication year - 2015
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.4935422
Subject(s) - materials science , wurtzite crystal structure , nanocomposite , substrate (aquarium) , nanostructure , perovskite (structure) , strain (injury) , condensed matter physics , optoelectronics , thin film , nanotechnology , crystallography , zinc , metallurgy , chemistry , medicine , oceanography , physics , geology
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
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