Depolarization Field in Thin Ferroelectric Films With Account of Semiconductor Electrodes

Abstract

Within the framework of the phenomenological Ginzburg-Landau theory influence of semiconductor electrodes on the properties of thin ferroelectric films is considered. The contribution of the semiconductor electrodes with different Debye screening length of carriers is included in the functional of free energy.

The influence of highly doped semiconductor electrodes on the depolarization field and the film properties was shown to be great.

Keywords:

• Thin ferroelectric films
• semiconducting electrodes
• depolarization field
• variational method

PACS numbers:

• 77.80.Bh
• 77.80.−e
• 68.60.−p

Acknowledgments

We are grateful to Prof. D. R. Tilley for drawing our attention to the importance of arbitrary metallic electrode contribution calculations and for fruitful discussion of the results.