In this paper, a piezoelectric phononic crystal beam at the nanoscale has been mechanically
modeled by using the surface piezoelectric theory. The band gap has been calculated by the
plane wave expansion method and the band gap structure picture has been analyzed. The
influence of electromechanical coupling effects, surface effects and geometry on the band
gap properties are discussed separately. This study contributes positively to the design and
active control of nanoelectromechanical systems.
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