Dipole Interactions among Polar Defects: A Self-Consistent Theory with Application to OH Impurities in KCl.

摘要

Certain atoms and molecules when dissolved in small concentrations in alkali halides are known to form dipoles with well-defined discrete orientations. The dipole orientations are determined by the directions of the potential minima within the lattice vacancy they occupy, and the dipoles can tunnel among the equivalent potentials in the crystalline lattice. One example of the occurrence of such dipoles is found when OH(-) impurities are dissolved in KCl. This system was shown by Kuhn and Luty to have six possible orientations in the six equivalent (1,0,0) directions; its properties will be discussed in this paper.