Manifestation of axiotaxy induced by the (10.4) plane in high-temperature-grown bismuth telluride films on InP(111)

Abstract

Fiber-like textures resulting from axiotaxy in BiTe films grown on InP(111) at high temperatures are investigated. Pole-figure measurements of X-ray diffraction reveal the axiotaxy being driven by the (10.4) plane of BiTe, whose d-spacing is nearly matched to that of the InP(11) plane. Coexistence of additional minor axiotaxy textures generated by other planes is also indicated. We provide transmission-electron-microscopy evidence of an epitaxy where the d-spacing is adjusted between the BiTe(10.8) and InP(11) planes by altering the local lattice periodicity. The alignment of the axiotaxy axis associated with the (10.4) plane is about 5° shifted from the InP〈11〉 direction towards the InP(111) plane, suggesting significant lattice distortions at the vicinity of the hetero-interface.