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    chiral phonon tagged posts

    Scientists discover ‘Chiral Phonons’ – Atomic Rotations in a 2D Semiconductor Crystal

    February 3, 2018, Categories  Chemistry/Nanotechnology, Physics, Technology/Electronics

    This diagram maps out atomic motion in separate phonon modes. At left ("LO" represents a longitudinal optical mode), selenium atoms exhibit a clockwise rotation while tungsten atoms stand still. At right ("LA" represents a longitudinal acoustic mode), tungsten atoms exhibit a clockwise rotation while selenium atoms rotate in a counterclockwise direction. Credit: Hanyu Zhu, et al.

    This diagram maps out atomic motion in separate phonon modes. At left (“LO” represents a longitudinal optical mode), selenium atoms exhibit a clockwise rotation while tungsten atoms stand still. At right (“LA” represents a longitudinal acoustic mode), tungsten atoms exhibit a clockwise rotation while selenium atoms rotate in a counterclockwise direction. Credit: Hanyu Zhu, et al.

    Experiments confirm the first chiral phonon that could enable exotic forms of electronics. Berkeley Lab has found the first evidence that a shaking motion in the structure of an atomically thin (2D) material possesses a naturally occurring circular rotation...

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