Electrostatic Coulomb Interaction Research Articles

Theory of diffusion-controlled tunnelling recombination incorporating Coulomb interaction and annihilation

The theory of diffusion-controlled defect recombination incorporating the tunnelling transfer of electrons between spatially well-separated defects, an annihilation of close defects and their Coulomb electrostatic interaction is developed. The estimates of the quasi-steady reaction radius is given employing the variational principle. The estimates obtained have been applied to attraction and repulsion cases, namely to pairs Vk-A0, in alkali halides, and the di-pair model in semiconductors. The problem of interpretation of the fractional glow technique spectra is discussed.

Surface energy of spinel

The contributions of the Coulomb electrostatic interaction and the Born-Mayer repulsive interaction to the surface energy MgAl2O4 are calculated. These results are compared with the surface-energy values calculated from elastic constants. The results show that surfaces parallel to {111} planes are of lowest energy for MgAl2O4 spinel as well as some spinel ferrites. Except for qualitative evidence, most of these predictions await experimental verification, including the predictions of the composition of freshly cleaved spinel surfaces.