Correlation effects in atomic transport in solids refer to those effects which enhance or depress the value of the transport quantity in question compared with that for a random walk. In general, correlation effects are manifested as a memory between successive jump vectors of the diffusing entity. As is shown herein, the diffusing entity can be an ion, a group of ions of the same type, or even the entire system.
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Murch et al. (1989) studied this question.
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