Abstract
A theory of ion transfer processes in an insulating layer containing a uniform distribution of traps throughout its volume is formulated. It is shown that free ions localized near the surface are held in a potential well created by repulsion from trapped carriers. Accordingly, the activation energy of the free-ion current is higher than the mobility activation energy and decreases as the voltage is increased, while detrapping takes place with a time delay. The temperature dependence of the depolarization current has two or three peaks, whose positions and profiles change with the voltage. A distinctive feature of the transfer of ions through an insulator containing traps is the “memory” of the electric field driving the carriers toward the surface prior to the start of the transfer process.
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