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Phononic crystals

Entering an acoustic phase

Electrons moving in a one-dimensional crystal can acquire a geometrical phase. Sound waves in phononic crystals are now shown to display the same effect — underlining the similarity between conventional solids and acoustic metamaterials.

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Figure 1: One-dimensional systems and the Zak phase.


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Correspondence to Julio T. Barreiro.

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Barreiro, J. Entering an acoustic phase. Nature Phys 11, 215–216 (2015).

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