Prediction of a strong polarizing field in thin film paraelectrics

Journal article


Gattinoni, C. and Spaldin, N. (2022). Prediction of a strong polarizing field in thin film paraelectrics. Physical Review Research. 4, p. L032020. https://doi.org/10.1103/PhysRevResearch.4.L032020
AuthorsGattinoni, C. and Spaldin, N.
Abstract

We demonstrate the existence of a polarizing field in thin films of insulators with charged ionic layers. The polarizing field derives from the same physics as the well-known depolarizing field that suppresses ferroelectric polarization in thin-film ferroelectrics, but instead drives thin films of materials that are centrosymmetric and paraelectric in their bulk form into a noncentrosymmetric, polar state. We illustrate the behavior using density-functional computations for perovskite-structure potassium tantalate, KTaO3, which is of considerable interest for its high dielectric constant, proximity to a quantum critical point, and superconductivity. We then provide a simple recipe to identify whether a particular material and film orientation will exhibit the effect and develop an electrostatic model to estimate the critical thickness of the induced polarization in terms of basic material parameters. Our results provide practical guidelines for exploiting the electrostatic properties of thin-film ionic insulators to engineer novel functionalities for nanoscale devices.

Keywordsferroelectrics, potassium tantalate, depolarizing field
Year2022
JournalPhysical Review Research
Journal citation4, p. L032020
PublisherAPS
ISSN2643-1564
Digital Object Identifier (DOI)https://doi.org/10.1103/PhysRevResearch.4.L032020
Web address (URL)https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.4.L032020
Publication dates
Print05 Aug 2022
Publication process dates
Deposited15 Sep 2022
Publisher's version
License
File Access Level
Open
Accepted author manuscript
License
File Access Level
Controlled
Permalink -

https://openresearch.lsbu.ac.uk/item/91xwy

Download files


Publisher's version
PhysRevResearch.4.L032020.pdf
License: CC BY
File access level: Open

  • 5
    total views
  • 3
    total downloads
  • 0
    views this month
  • 0
    downloads this month

Export as

Related outputs

Adsorption of the prototypical organic corrosion inhibitor benzotriazole on the Cu(100) surface
Turano, M., Walker, M., Grillo, F., Gattinoni, C., Hunt, G., Kirkman, P., Richardson, N.V., Baddeley, C.J. and Costantini, G. (2022). Adsorption of the prototypical organic corrosion inhibitor benzotriazole on the Cu(100) surface. Corrosion Science. 207, p. 110589. https://doi.org/10.1016/j.corsci.2022.110589
Copper adatoms mediated adsorption of benzotriazole on a gold substrate
Grillo, F, Gattinoni, C., Larrea, C. R., Lacovig, P. and Richardson, N. V. (2022). Copper adatoms mediated adsorption of benzotriazole on a gold substrate. Applied Surface Science. 600, p. 154087. https://doi.org/10.1016/j.apsusc.2022.154087
Magnetoelectric Effect in Hydrogen Harvesting: Magnetic Field as a Trigger of Catalytic Reactions (Adv. Mater. 19/2022)
Kim, D., Efe, I., Torlakcik, H., Terzopoulou, A., Veciana, A., Siringil, E., Mushtaq, F., Franco, C., Arx, D., Sevim, S., Puigmartí‐Luis, J., Nelson, B., Spaldin, N.A., Gattinoni, C., Chen, X.‐Z. and Pané, S. (2022). Magnetoelectric Effect in Hydrogen Harvesting: Magnetic Field as a Trigger of Catalytic Reactions (Adv. Mater. 19/2022). Advanced Materials. 34 (19), p. 2270139. https://doi.org/10.1002/adma.202270139
Understanding the Interaction of Organic Corrosion Inhibitors with Copper at the Molecular Scale: Benzotriazole on Cu(110)
Turano, M., Walker, M., Grillo, F., Gattinoni, C., Edmondson, J., Adesida, O., Hunt, G., Kirkman, P., Richardson, N.V., Baddeley, C.J., Michaelides, A. and Costantini, G. (2021). Understanding the Interaction of Organic Corrosion Inhibitors with Copper at the Molecular Scale: Benzotriazole on Cu(110). Applied Surface Science. https://doi.org/10.1016/j.apsusc.2021.151206