Structural energies of defects in CdTe and HgCdTe
Self-consistent tight-binding supercell calculations of localised defect levels and nearest-neighbour relaxations are presented for Cd, Hg and In interstitials at tetrahedral and hexagonal sites in CdTe and HgTe. The mechanisms driving the relaxation and the resulting character of the lattice distortion about various interstitials are insensitive to the alloy composition and should remain valid for interstitials in Hg-rich HgCdTe.