✉news SciencePhysics first seen 12 h ago, last 4 h ago, peak #5
Phonon Thermal Hall Effect Turns Out to Be Widespread
Original: The Unexpected Ubiquity of the Phonon Thermal Hall Effect
Physicists are reporting that the phonon thermal hall effect, once thought rare, appears to be unexpectedly common across insulating materials. Recent observations in multiple compounds suggest lattice vibrations can carry heat in ways that produce transverse thermal currents even without charge flow, challenging existing theories of heat transport. Researchers are now debating which microscopic mechanisms, from magnetic impurities to phonon Berry curvature, best explain the phenomenon's prevalence.
Why now: New research and commentary suggest the effect is far more common than previously believed, prompting debate over its mechanisms.
American Physical Societyphonon thermal hall effect
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Evidence
- The Unexpected Ubiquity of the Phonon Thermal Hall Effect · American Physical Society
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