摘要
Heteroepitaxial ZnO and SrRuO 3 were grown on SrTiO 3 (111) substrates and formed a self-assembled wurtzite-perovskite nanostructure. Spontaneous orientation-tuning of the SrRuO 3 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 SrTiO 3 substrate to the vertical strain provided by the ZnO matrix. The [011]-SrRuO 3 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.