Electromechanical properties and electron tunnelling in KTaO3
- 14 November 1977
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 10 (21), 4319-4333
- https://doi.org/10.1088/0022-3719/10/21/019
Abstract
The electromechanical constants and polarisation moments of KTaO3 have been determined for samples of varying size. The polarisation moments exhibit a large size dependence, and this effect is interpreted in terms of space charge, which is formed by ionisation of traps. Space-charge fields are shown to arise spontaneously and are also induced by external fields. Large external fields have been observed to alter the electro-mechanical response irreversibly. This observation is explained in terms of electron tunnelling between shallow traps and rectification of the metal-dielectric Schottky barrier.Keywords
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