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Related Concept Videos

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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Updated: May 31, 2026

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
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Published on: August 15, 2018

Coupled ferroelectricity and phonon chirality.

Xiang-Bin Han1,2, Cong Yang2,3, Rui Sun2,4

  • 1Department of Chemistry, North Carolina State University, Raleigh, NC, 27695, USA.

Nature Communications
|May 29, 2026
PubMed
Summary
This summary is machine-generated.

Scientists demonstrate electric-field control of chiral phonons in ferroelectric triglycine sulfate. This discovery enables manipulation of chirality-dependent quantum states and opens new avenues for chiral-phonon-enabled technologies.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Chemistry

Background:

  • Ferroelectricity and chirality are fundamental properties with potential for coupling.
  • Optically active ferroelectrics offer a platform for manipulating chirality using electric fields.
  • Controlling chirality-dependent quantum states is crucial for advanced technologies.

Purpose of the Study:

  • To experimentally demonstrate the coupling between ferroelectricity and phonon chirality.
  • To achieve device-compatible control of phonon chirality via electric-field switching.
  • To explore the potential of ferroelectric materials for chiral-phonon-enabled technologies.

Main Methods:

  • Experimental investigation using triglycine sulfate, a molecular ferroelectric.
  • In situ time-resolved magneto-optical Kerr effect measurements.
  • Density functional theory calculations and circularly polarized Raman spectroscopy.

Main Results:

  • Demonstrated reversible control of phonon chirality by electrically switching crystal chirality.
  • Observed reversal of Kerr rotation with electric-field switching.
  • Showcased vanishing phonon chirality in the paraelectric phase and tunability in the ferroelectric state.

Conclusions:

  • Established an electrically addressable coupling between ferroelectricity, structural chirality, chiral phonons, and spin.
  • Opened a pathway for chiral-phonon-enabled spin and phonon control technologies.
  • Highlighted the potential of ferroelectric materials for novel quantum applications.