Simulation on the optical polarized properties for the PbWO_4 crystal containing a pair of V_(Pb)~(2-)-V_O~(2+);

After the lattice structure containing a pair of V_(Pb)~(2-)-V_O~(2+) optimized,the electronic structure,dielectric function,complex refractive index and absorption spectra of the perfect PbWO_4(PWO)crystal and the PWO crystal containing a pair of V_(Pb)~(2-)-V_O~(2+) were calculated using LAPW +lo method.

Optical polarized properties for the PbWO_4 crystal containing lead vacancy;

The theoretical research on the bond type switch in undoped and c-doped anatase with oxygen vacancy;

It also analyzes and views the future of introducing oxygen vacancy.

The electronic structures,dielectric functions and absorption spectra for the CaMoO4(CMO) crystal with and without oxygen vacancy VO2+ have been calculated using the CASTEP code with the lattice structure optimized.

In contrast to the sample annealed in air,more oxygen vacancies and/or defects exist in the sample annealed in vacuum.

It is believed that the dielectric anomaly is caused by defect dipoles related to oxygen vacancies.

The effect of AC measuring signal level on the dielectric properties of SrTiO3 thin films was investigated and the variation rule of the dielectric properties of SrTiO3 thin films with different concentration of oxygen vacancies according to AC measuring signal level was studied.