Measurement of Nonlinear Polarization of KTaO3 using Schottky Diodes

TLDR: Capacitance vs bias voltage data are presented for Au-KTaO3 surface barrier Schottky diodes in this article, where substantial deviations from the normal Schottiness capacitance relationship have been observed and attributed to a field-dependent dielectric constant in the depletion layer.

Abstract: Capacitance vs bias voltage data are presented for Au–KTaO3 surface barrier Schottky diodes. Substantial deviations from the normal Schottky capacitance relationship have been observed and attributed to a field‐dependent dielectric constant in the depletion layer. From the capacitance data obtained at room temperature, e vs E and P vs E curves have been calculated for KTaO3 and found to be consistent with previous measurements made using conventional techniques at 4.2°K.