Abstract
Near-surface structures of polar InN films were investigated by laboratory-based hard x-ray photoelectron diffraction (HXPD) with chemical-state-discrimination. HXPD patterns from In 3d5/2 and N 1s core levels of the In-polar and N-polar InN films were different from each other and compared with the simulation results using a multiple-scattering cluster model. It was found that the near-surface structure of the In-polar InN film was close to the ideal wurtzite structure. On the other hand, on the N-polar InN film, defects-rich surface was formed. In addition, the existence of the In-polar domains was observed in the HXPD patterns.
