Temperature-Dependent Nonlinear Damping in Palladium Nanomechanical Resonators.

Advances in nanofabrication techniques have made it feasible to observe damping phenomena beyond the linear regime in nanomechanical systems. In this work, we report cubic nonlinear damping in palladium nanomechanical resonators. Nanoscale palladium beams exposed to a H atmosphere become softer and display enhanced Duffing nonlinearity as well as nonlinear damping at ultralow temperatures.