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arXiv · 1509.03080

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
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Abstract

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.

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E. Kramer, D. J. J. van Dorp, R. van Leeuwen, W. J. Venstra. 2015-09-10. Strain-dependent damping in nanomechanical resonators from thin $\mathrm{MoS_2}$ crystals. https://doi.org/10.1063/1.4929507

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