Frequency dependence of hopping conductivity and mixed alkali effect
The temperature dependence of the percolation efficiency of a binary system in the two-dimensional honeycomb lattice was extracted from the calculation of the difference in the composition dependence of δ (∞) and δ(0) in order to show that the percolation efficiency consititutes the major part of the mixed alkali effect. The path probability method calculates δ(∞) correctly in the pair approximation, while for the calculation of δ(0), both the instantaneous distribution conversion process and the time conversion process were applied.