We investigate the effect of mechanical strain on the dynamics of thin MoS2 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.
@article{arxiv.1509.03080,
title = {Strain-dependent damping in nanomechanical resonators from thin $\mathrm{MoS_2}$ crystals},
author = {E. Kramer and D. J. J. van Dorp and R. van Leeuwen and W. J. Venstra},
journal= {arXiv preprint arXiv:1509.03080},
year = {2015}
}