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Hypersonic waves in glasses PDF Print E-mail
 The lack of long-range structural order in amorphous materials induces thermodynamic anomalies, whose impact dominates at length scales comparable to interatomic distances. We report in Nature Communications a study of mesoscopic elastic domains by means of a broadband version of picosecond photo-acoustics, developed to coherently generate and detect hypersonic sound waves in the sub-THz region with unprecedented sampling efficiency. We identify a peculiar behaviour of the sound attenuation, ruled by a fractal frequency dependence.
Last Updated ( Friday, 31 July 2015 )
 
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