Abstract
In this paper, the magnetic and optical properties of ErP and ErSb nanolayers have been investigated in the presence of spin-orbit coupling using density functional theory by Wien2k package. The total energy of ErP and ErSb nanolayers as a function of unit cell volume is calculated in ferromagnetic and nonmagnetic phases using generalized gradient approximation (GGA) approach. It is seen that at zero pressure, the ferromagnetic phase is more stable than nonmagnetic phase. The density of states (DOS) calculation shows that the major contribution to the occupied part of DOS around the Fermi energy comes from 4f orbital of Er and p orbital of P and Sb atoms. The dielectric functions and other optical properties of these compounds have anisotropic behavior. The maximum reflectivity of these nanolayers occurs in the ultra-violet range; then, these nanolayers could be good candidates for shielding ultraviolet radiations.
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