Effect of ferroelectric parameters on ferroelectric diodes

We investigate the effect of various ferroelectric parameters, such as the doping density, the permittivity, and the thickness, on ferroelectric diodes based on the proposed self-consistent numerical model. Our calculations clarify the dependence of the band diagrams, the charge density distributions, and the I-V curves on these important ferroelectric parameters in metal/ferroelectrics/metal structures. The calculated results reveal that the ON/OFF ratio of the ferroelectric diodes decreases with the increase of the doping density, the permittivity, and the thickness in the ferroelectric film, respectively. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3692769]