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arXiv 1003.1868cond-mat.mes-hall
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纳米机械谐振器的阻尼

Damping of Nanomechanical Resonators

Quirin P. Unterreithmeier, Thomas Faust, Jorg P. Kotthaus

摘要:

我们研究了纳米机械氮化硅弦在高张应力下的横向振荡模式作为几何形状和模式指数m <= 9的函数。再现所有观察到的共振频率与经典弹性理论,我们提取相关的弹性常数。基于振荡的局部应变,我们成功地预测了所观察到的模式相关的阻尼与一个单一的频率无关的拟合参数。我们的模型阐明了张应力对阻尼的作用,并暗示了潜在的微观机制。

英文摘要:

We study the transverse oscillatory modes of nanomechanical silicon nitride strings under high tensile stress as a function of geometry and mode index m <= 9. Reproducing all observed resonance frequencies with classical elastic theory we extract the relevant elastic constants. Based on the oscillatory local strain we successfully predict the observed mode-dependent damping with a single frequency independent fit parameter. Our model clarifies the role of tensile stress on damping and hints at the underlying microscopic mechanisms.

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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