Abstract
We have performed an inter-ionic potential theory with modified ionic charge to investigate the structural, elastic and thermal properties of DyP and DyAs theoretically, at high pressure. We found a structural phase transition from NaCl (B1) - to CsCl (B2)-type structure at 57 GPa for DyP and 51 GPa for DyAs and other properties, such as lattice constant, bulk modulus, cohesive energy and second-order elastic constants were also calculated and compared with the available theoretical data. In order to gain further information, we have also predicted the Young's modulus (E), Poisson's ratio (v), anisotropy factor (A) and Debye temperature (θD). Our results are in good agreement with theoretical data where available and provide predictions where they are not.
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