Electron phase modulation in a high Q nanomechanical resonator

The electron transport in a quasi one-dimensional electron system embedded in a high Q nanoelec-tromechanical system is investigated at mechanical resonance whilst being immersed in a uniform magnetic field. The resistance change, as a function of magnetic field (magnetopiezoresistance), in the quasi one-dimensional electron system at resonance showed highly periodic oscillations which arise via strain induced modulation of the electron phase. Our analysis reveal that mechanical activation of the quasi one-dimensional electron system affects only a few electron trajectories and the electron interference in only a single electron loop gives rise to the resistance oscillations in the magnetopiezoresistance.