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arXiv 1509.03080cond-mat.mes-hall
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由薄$\mathrm{MoS_2}$晶体制成的纳米机械谐振器中的应变相关阻尼

Strain-dependent damping in nanomechanical resonators from thin $\mathrm{MoS_2}$ crystals

E. Kramer, D. J. J. van Dorp, R. van Leeuwen, W. J. Venstra

摘要:

我们研究了机械应变对薄$\mathrm{MoS_2}$纳米鼓谐振器动力学的影响。使用压电晶体,压缩和拉伸双轴应变诱导在最初的平面和屈曲设备。在平面器件中,我们观察到一个显着的应变依赖性的谐振线宽,而在谐振频率的变化是相对较小的。在屈曲装置中,阻尼的应变依赖性不太明显,并且观察到明显的滞后。该实验表明,几何缺陷,如微观皱纹,可能在从2-D材料制造的纳米谐振器中观察到的强耗散中发挥作用。

英文摘要:

We investigate the effect of mechanical strain on the dynamics of thin $\mathrm{MoS_2}$ nanodrum resonators. Using a piezoelectric crystal, compressive and tensile biaxial strain is induced in initially flat and buckled devices. In the flat device, we observe a remarkable strain-dependence of the resonance line width, while the change in the resonance frequency is relatively small. In the buckled device, the strain-dependence of the damping is less pronounced, and a clear hysteresis is observed. The experiment suggests that geometric imperfections, such as microscopic wrinkles, could play a role in the strong dissipation observed in nanoresonators fabricated from 2-D materials.

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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