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arXiv 1102.1029cond-mat.dis-nncond-mat.other
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应力如何降低玻璃中的耗散

How Stress Can Reduce Dissipation in Glasses

Jiansheng Wu, Clare C. Yu

摘要:

我们认为应力可以降低非晶态固体的内部摩擦,或者通过增加缺陷的势垒,从而减少它们的隧穿和热激活产生的损失,或者通过减少缺陷和声子之间的耦合。这种应力可能来自杂质、原子键合约束或外部施加的应力。外部施加的应力也通过耗散稀释减少机械损失。我们的结果与实验一致,并预测应力可以大大降低介电损耗,提高热导率。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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