Light induced phenomena in superionic crystals |
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Authors: | S Bredikhin |
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Institution: | (1) Institute of Solid State Physics, Russian Academy of Science, 142432 Chernogolovka, Moscow dist., Russia |
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Abstract: | The phenomena of the reversible transformation of concentration and a structure of luminescence centers and of the concentration
of mobile silver ions in local irradiated region of RbAg4I5 superionic crystals are studied. A new effect of illumination on ionic conductivity and activation energy of migration of
mobile Ag+ cations in RbAg4I5 superionic crystals are observed. Reversible changes in the ionic conductivity due to illumination of superionic crystals
are caused by reversible change in the structure of electronic centers caused by elastic strain around these centers. The
effect of elastic deformation on the process of ionic transport and activation energy for diffusion of mobile silver cations
are studied. Photostimulated recovery of the ionic conductivity after its change due to preliminary illumination of a RbAg4I5 superionic crystal with light of wavelength λ=430 nm are detected. This recovery of the ionic conductivity is due to excitation
of centers in complexes generated by previous illumination of tested samples. |
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