Abstract
Electronic excitation in solids with strong lattice coupling often leads to efficient formation of lattice defects of Frenkel pairs. In most halide crystals, for example, electron-hole pairs or excitons are localized at a lattice site to form the self- trapped exciton (STE), and the adiabatic instability of the STE induces further displacement of the lattice to the defect pair composed of an F center, a halogen vacancy with an electron, an H center, and a X2 molecular ion (X denotes a halogen atom) at an anion site.
© 1991 Optical Society of America
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