High-pressure structural and optical properties of wurtzite-type Zn1-xMgxSe

High-pressure diffraction experiments for wurtzite-type zinc magnesium selenide were performed using a large-anvil X-ray diffraction press, MAX80, and synchrotron radiation. The pressure dependence of unit-cell parameters was determined for Zn0.53Mg0.47Se for pressures ranging up to 5.17 GPa. The value of bulk modulus and its pressure derivative were calculated from the pressure-volume dependence by fitting the Birch-Murnaghan equation of state (EOS). They are compared with reported data for ZnSe, MgSe and some related solid solutions. Photoluminescence (PL) data for Zn0.38Mg0.62Se were collected using a diamond-anvil cell at a lower pressure. These data show an evolution of the main deep-levels emission band: a narrowing of the spectrum, an increase of luminescence intensity and a blue shift