  The elastic response of suspended NbSe3 nanowires is studied across the
charge density wave phase transition. The nanoscale dimensions of the resonator
lead to a large resonant frequency (10-100 MHz), bringing the excited phonon
frequency in close proximity of the plasmon mode of the electronic condensate -
a parameter window not accessible in bulk systems. The interaction between the
phonon and plasmon modes strongly modifies the elastic properties at high
frequencies. This is manifested in the nanomechanics of the system as a sharp
peak in the temperature dependence of the elastic modulus (relative change of
12.8%) in the charge density wave phase.
