Band gap bowing in NixMg1-xO.

ABSTRACT: Epitaxial transparent oxide NixMg1-xO (0???x???1) thin films were grown on MgO(100) substrates by pulsed laser deposition. High-resolution synchrotron X-ray diffraction and high-resolution transmission electron microscopy analysis indicate that the thin films are compositionally and structurally homogeneous, forming a completely miscible solid solution. Nevertheless, the composition dependence of the NixMg1-xO optical band gap shows a strong non-parabolic bowing with a discontinuity at dilute NiO concentrations of x??0.074 and account for the anomalously large band gap narrowing in the NixMg1-xO solid solution system.

SUBMITTER: Niedermeier CA 

PROVIDER: S-EPMC4977526 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature