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Chiral Phonons

All articles tagged with #chiral phonons

science1 month ago•36 min saved

Electric-field controlled handedness of lattice vibrations in BaTiO3 revealed

Researchers use circularly polarized resonant inelastic X-ray scattering (RIXS) on freestanding BaTiO3 membranes to directly observe and reversibly switch the chirality of g-wave phonons by reversing the ferroelectric polarization with a small electric field. The circular dichroism in RIXS flips sign when polarization is inverted, proving electric-control of phonon angular momentum (PAM) and revealing a gyroelectric-like effect in reciprocal space, with results in quantitative agreement with first-principles calculations and implications for phonon-based information technologies.

via Nature|

#batio3 #chiral-phonons #ferroelectricity

science-and-technology2 years ago•4 min saved

Harnessing Chiral Phonons Unlocks Quantum Transformation and Magnetic Phenomena

Researchers at Rice University have discovered that when the atomic lattice in a rare-earth crystal vibrates in a corkscrew-shaped motion called a chiral phonon, the crystal becomes magnetized. By exposing cerium fluoride to ultrafast pulses of light, the spins of electrons align with the atomic rotation, resulting in magnetization. This effect, known as spin-phonon coupling, has potential applications in developing novel magnetic and quantum materials. The study provides insights into the interaction between chiral phonons and material properties, contributing to the understanding of quantum effects in solids.

via Phys.org|

#chiral-phonons #magnetization #quantum-materials