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Letter
Nature Materials 5, 452–456 (1 June 2006) | doi:10.1038/nmat1644
Ultrasonic metamaterials with negative modulus
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Abstract
The emergence of artificially designed subwavelength electromagnetic materials, denoted metamaterials, has significantly broadened the range of material responses found in nature. However, the acoustic analogue to electromagnetic metamaterials has, so far, not been investigated.
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