Elastic stability and optical property under pressure of TiN phases: by first principles study

Abstract

The electronic and optical properties of the rock-salt, CsCl-type, zinc-blende and wurtzite phases of TiN have been calculated by First-Principles study for relaxed and under pressure conditions. Calculations are based on the density functional theory and full potential augmented plane waves method by Generalized Gradient Approximation. The optical transitions in zero pressure are derived from the density of states and dielectric function. In addition, various optical characters, such as reflectivity, refraction and extinction indices, under positive and negative pressures are compared and contrasted. It is found that all mentioned phases of TiN are elastically stable and exhibit a rising trend in their plasmonic frequencies by increasing the pressure imposed on.

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