How Stress Can Reduce Dissipation in Glasses

Details How Stress Can Reduce Dissipation in Glasses How Stress Can Reduce Dissipation in Glasses

2011-02-04

arxiv.org/abs/1102.1029v2

Physical Review B 84, 174109 (2011)

Physics

Condensed Matter

Disordered Systems and Neural Networks

9 pages, 7 figures

Scientific paper

10.1103/PhysRevB.84.174109

We propose that stress can decrease the internal friction of amorphous solids, either by increasing the potential barriers of defects, thus reducing their tunneling and thermal activation that produce loss, or by decreasing the coupling between defects and phonons. This stress can be from impurities, atomic bonding constraints, or externally applied stress. Externally applied stress also reduces mechanical loss through dissipation dilution. Our results are consistent with the experiments, and predict that stress could substantially reduce dielectric loss and increase the thermal conductivity.

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