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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 buckleddevices. In the flat device, we observe a remarkable strain-dependence of theresonance line width, while the change in the resonance frequency is relativelysmall. In the buckled device, the strain-dependence of the damping is lesspronounced, and a clear hysteresis is observed. The experiment suggests thatgeometric imperfections, such as microscopic wrinkles, could play a role in thestrong dissipation observed in nanoresonators fabricated from 2-D materials.

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