Low-temperature electrical conductivity of congruent lithium niobate crystals
- Cite this article as:
- Akhmadullin, I.S., Golenishchev-Kutuzov, V.A., Migachev, S.A. et al. Phys. Solid State (1998) 40: 1190. doi:10.1134/1.1130517
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The electrical conductivity of lithium niobate crystals was investigated at temperatures between 80 and 450 K as a function of the oxidation-reduction annealing conditions. The results are interpreted in terms of polaron electrical conductivity at room temperature and above. A reduction in the measurement temperature leads to “freezing out” of small-radius polarons, and hopping of Heitler-London bipolarons via unfilled NbLi sites becomes the main mechanism responsible for the electrical conductivity.