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In-situ monitoring of interface proximity effects in ultrathin ferroelectrics

Author

Listed:
  • Nives Strkalj

    (ETH Zurich)

  • Chiara Gattinoni

    (ETH Zurich)

  • Alexander Vogel

    (Swiss Federal Laboratories for Materials Science and Technology, Empa)

  • Marco Campanini

    (Swiss Federal Laboratories for Materials Science and Technology, Empa)

  • Rea Haerdi

    (ETH Zurich)

  • Antonella Rossi

    (ETH Zurich
    University of Cagliari)

  • Marta D. Rossell

    (Swiss Federal Laboratories for Materials Science and Technology, Empa)

  • Nicola A. Spaldin

    (ETH Zurich)

  • Manfred Fiebig

    (ETH Zurich)

  • Morgan Trassin

    (ETH Zurich)

Abstract

The development of energy-efficient nanoelectronics based on ferroelectrics is hampered by a notorious polarization loss in the ultrathin regime caused by the unscreened polar discontinuity at the interfaces. So far, engineering charge screening at either the bottom or the top interface has been used to optimize the polarization state. Yet, it is expected that the combined effect of both interfaces determines the final polarization state; in fact the more so the thinner a film is. The competition and cooperation between interfaces have, however, remained unexplored so far. Taking PbTiO3 as a model system, we observe drastic differences between the influence of a single interface and the competition and cooperation of two interfaces. We investigate the impact of these configurations on the PbTiO3 polarization when the interfaces are in close proximity, during thin-film synthesis in the ultrathin limit. By tailoring the interface chemistry towards a cooperative configuration, we stabilize a robust polarization state with giant polarization enhancement. Interface cooperation hence constitutes a powerful route for engineering the polarization in thin-film ferroelectrics towards improved integrability for oxide electronics in reduced dimension.

Suggested Citation

  • Nives Strkalj & Chiara Gattinoni & Alexander Vogel & Marco Campanini & Rea Haerdi & Antonella Rossi & Marta D. Rossell & Nicola A. Spaldin & Manfred Fiebig & Morgan Trassin, 2020. "In-situ monitoring of interface proximity effects in ultrathin ferroelectrics," Nature Communications, Nature, vol. 11(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-19635-7
    DOI: 10.1038/s41467-020-19635-7
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    Cited by:

    1. Chen Lin & Zijun Zhang & Zhenbang Dai & Mengjiao Wu & Shi Liu & Jialu Chen & Chenqiang Hua & Yunhao Lu & Fei Zhang & Hongbo Lou & Hongliang Dong & Qiaoshi Zeng & Jing Ma & Xiaodong Pi & Dikui Zhou & Y, 2023. "Solution epitaxy of polarization-gradient ferroelectric oxide films with colossal photovoltaic current," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Martin F. Sarott & Marta D. Rossell & Manfred Fiebig & Morgan Trassin, 2022. "Multilevel polarization switching in ferroelectric thin films," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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