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Freestanding Ferroelectric Bubble Domains.

Saidur R Bakaul1, Sergei Prokhorenko2, Qi Zhang3

  • 1Materials Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA.

Advanced Materials (Deerfield Beach, Fla.)
|September 20, 2021
PubMed
Summary
This summary is machine-generated.

Specially ordered electric dipoles, or bubble-like domains, can be retained in freestanding ferroelectric heterostructures despite structural ripples. This finding opens new avenues for exploring electric skyrmions with flexible topological orders.

Keywords:
ferroelectric bubblesfreestanding heterostructuresripplessingle-crystal complex oxidesskyrmions

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Ferroelectricity

Background:

  • Bubble-like domains, precursors to electrical skyrmions, typically form in ultrathin ferroelectric heterostructures on flat substrates.
  • Understanding domain behavior in freestanding or flexible systems is crucial for novel electronic applications.

Purpose of the Study:

  • To investigate the retention of bubble-like domains in freestanding ferroelectric heterostructures with structural ripples.
  • To analyze the stabilization mechanisms of these domains in a modified electromechanical energy landscape.
  • To compare the morphology of domains in freestanding versus as-grown states.

Main Methods:

  • Probing local piezoelectric and capacitive responses.
  • Utilizing atomistic simulations.
  • Analyzing structural ripples and domain morphology.

Main Results:

  • Bubble-like domains can be retained in freestanding ferroelectric heterostructures, even with inhomogeneous structural ripples.
  • The stabilization of these domains is influenced by the modified electromechanical energy landscape.
  • Distinct morphological differences exist between bubbles in freestanding and as-grown states.

Conclusions:

  • Freestanding ferroelectric heterostructures can host stable bubble-like domains, challenging previous assumptions.
  • These findings pave the way for exploring electric skyrmions with tunable boundaries and topological orders in curvilinear ferroelectric systems.