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Acoustics

Acoustics

Relativistic quasiparticles tunnel through barrier with 100% transmission, verifying century-old prediction

06 Jan 2021 Hamish Johnston
Phononic crystal
Phononic crystal: the barrier was created using two different lattices that comprised acrylic cylinders. (Courtesy: University of Hong Kong)
A curious effect called “Klein tunnelling” has been observed for the first time in an experiment

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Hamish Johnston is an online editor of Physics World
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