Abstract
Wurtzite (w) and zincblende (zb) InN films have been grown on (011) SrTiO3 (STO) substrates by metal-organic chemical vapor deposition, the epitaxial relationships and optical properties are characterized by X-ray diffraction (XRD), absorption and photoluminescence (PL). Based on XRD θ–2θ and Φ scanning results, the epitaxial relationships between (w- and zb-) InN films and STO substrates are determined, that is, (0001)[1120] w-InN//(011)[100]STO and \((100)[011]_{\mathit{zb}\mbox{-}\mathrm{InN}}//(011)[100]_{\mathrm{STO}}\). Compared with the w-InN films, the zb-InN films exhibit a red shift in absorption edge and PL spectra, and a much narrower and stronger PL spectrum, implying a better optical quality of zb-InN films. The structure transition is supposed to be due to the difference in atom and bond areal density between the crystal plane of w-InN(0001) and zb-InN(100).
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Jia, C.H., Chen, Y.H., Zhang, B. et al. Wurtzite to zincblende transition of InN films on (011) SrTiO3 by decreasing trimethylindium flows. Appl. Phys. A 106, 655–659 (2012). https://doi.org/10.1007/s00339-011-6644-1
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DOI: https://doi.org/10.1007/s00339-011-6644-1