Jp. Aime et al., Nonlinear dynamic behavior of an oscillating tip-microlever system and contrast at the atomic scale, PHYS REV L, 82(17), 1999, pp. 3388-3391
In this paper the dynamic behavior of an oscillating tip-microlever system
at the proximity of a surface is discussed. We show that the nonlinear beha
vior of the oscillator is able to explain the high sensitivity of the oscil
lating tip microlever and the observed shifts of the resonance frequency as
a function of the tip surface distance without the need of introducing a p
articular short range force.