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Area of Science:

  • Condensed matter physics
  • Materials science
  • Photonics

Background:

  • Ferroic phase switching is crucial for technological applications but faces challenges like speed limitations and domain volatility.
  • Ferroaxial materials offer stable, symmetry-protected bistable states, but are difficult to manipulate with conventional techniques.

Purpose of the Study:

  • To demonstrate a novel method for ultrafast switching of ferroaxial order.
  • To overcome the limitations of conventional manipulation methods for ferroaxial materials.

Main Methods:

  • Engineered an effective axial field using circularly driven terahertz phonon modes.
  • Utilized terahertz pulses to induce and reverse ferroaxial domain switching.

Main Results:

  • Achieved photo-induced switching of ferroaxial order.
  • Demonstrated stable ferroaxial domains lasting for many hours.
  • Successfully reversed the switched domains using terahertz pulses of opposite helicity.

Conclusions:

  • The developed method enables robust and stable ultrafast switching of ferroaxial materials.
  • This work paves the way for developing advanced ultrafast information storage platforms.