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Theory of Sound Attenuation in Glasses: The Role of Thermal Vibrations

Fabian, Jaroslav and Allen, Philip B. (1999) Theory of Sound Attenuation in Glasses: The Role of Thermal Vibrations. Physical Review Letters 82 (7), pp. 1478-1481.

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Other URL: http://link.aps.org/abstract/PRL/v82/p1478


Sound attenuation and internal friction coefficients are calculated for a realistic model of amorphous silicon. It is found that, contrary to previous views, thermal vibrations can induce sound attenuation at ultrasonic and hypersonic frequencies that is of the same order or even larger than in crystals. The reason is the internal strain induced anomalously large Grüneisen parameters of the low-frequency resonant modes.

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Item type:Article
Date:February 1999
Institutions:Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian
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Dewey Decimal Classification:500 Science > 530 Physics
Refereed:Yes, this version has been refereed
Created at the University of Regensburg:Yes
Item ID:1832
Owner only: item control page


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