  Dynamic stabilization by simultaneous primary and superharmonic resonances
for high order nonlinearity cancellation is demonstrated with an
electrostatically-actuated, piezoresistively-transduced nanomechanical
resonator. We prove experimentally how the combination of both the third-order
nonlinearity cancellation and simultaneous resonances can be used to linearly
drive a nanocantilever up to very large amplitudes compared to fundamental
limits like pull-in occurrence, opening the way towards resonators with high
frequency stability for high-performance sensing or time reference.
