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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Polar textures are investigated as analogs to spin-based textures in ferromagnets.
  • Chirality is a key property with potential applications in advanced electronic devices.

Purpose of the Study:

  • To demonstrate deterministic and reversible control of chirality in ferroelectric vortices using an electric field.
  • To elucidate the microscopic origins and switching mechanisms of chirality in these systems.

Main Methods:

  • Optical second-harmonic generation-based circular dichroism was employed for experimental observation.
  • Phase-field modeling and second-principles simulations were used for theoretical analysis.

Main Results:

  • Deterministic and reversible control of chirality over mesoscale regions in ferroelectric vortices was achieved via electric field application.
  • The study detailed the microscopic origins, switching pathways, and electric field control mechanisms of chirality.

Conclusions:

  • Chirality can emerge from nonchiral materials and be controlled by an electric field.
  • This offers significant implications for developing novel electronics utilizing chirality as a field-controllable order parameter.