Breakdown of the Debye Approximation for the Acoustic Modes with Nanometric Wavelengths in Glasses

On the macroscopic scale, the wavelengths of sound waves in glasses are large enough that the details of the disordered microscopic structure are usually irrelevant and the medium can be considered as a continuum. On decreasing the wavelength this approximation must of course fail at one point. We s...

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Veröffentlicht in:	Proceedings of the National Academy of Sciences - PNAS 2009-03, Vol.106 (10), p.3659-3663
Hauptverfasser:	Monaco, Giulio, Giordano, Valentina M., Stanley, H. Eugene
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustic data Acoustic excitation Acoustic modes Acoustics Approximation Bosons Glass Low temperature Low temperature physics Particle velocity Physical Sciences Sound waves Specific heat Vibration Wavelengths
Online-Zugang:	Volltext
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