2 Computational Details:
SrTiO3 cubic structure belongs the Pm3m space group at room temperature. In this article electronic and structural properties of SrTiO3 plus its Ag doped sample were studied using technique of DFT. The CASTEP code was used for this, which made it simple to measure and compute the physical properties of a perovskite like SrTiO3. We research the impact of optical properties on dielectric constant in this software, as well as many other physical properties, but electrical, optical, structural, and electronic properties were our main concerns. First, we described and optimized the geometry of our perovskite, and then we used CASTEP to measure the physical properties of SrTiO3 [9,10]. Ground state properties and pseudo-physical properties were discovered using DFT. K-points pieces of Brillouin zone testing for unmixed and mixed SrTiO3 were set at 2×2×1 on the Monkhorst Pack grid [11-12].