The elastic, piezoelectric, and dielectric constants of 0.67Pb~Mg1/3Nb2/3!O3–0.33PbTiO3 domain engineered single crystal were determined experimentally by using ultrasonic and resonance methods. It was confirmed that the single crystal system has large electromechanical coupling coefficient k33 ~;94%! and piezoelectric constant d33 ~;2800 pC/N! if the poling is done along the @001# of pseudocub...

Any attempt made to separate energy into electrical and mechanical parts may lead to inconsistencies as they do not necessarily decouple. This is illustrated by application of the energy density function in the linear theory of piezoelasticity. By assuming that a critical energy density function prevails at the onset of crack initiation, it is possible to establish the relative size of an inner...

It is well-known that the nonlinear coupling between a mechanical oscillator and a superconducting resonator or optical cavity can be used to generate a Kerrnonlinearity for the cavity mode. We show that the strength of this Kerr-nonlinearity, as well as the effect of the photon-pressure force can be enormously increased by modulating the strength of the nonlinear coupling. We describe an elect...

The expressions of the Lie derivative of differential forms in the language of vector analysis are introduced. These formulae allow to describe naturally the electromechanical coupling, and the coupling term appears to be a volume integral. A general approach to compute forces is then proposed, which takes that fact into consideration. The method is applicable in 2D and in 3D, and with dual for...

As the thinnest conductive and elastic material, graphene is expected to play a crucial role in post-Moore era. Besides applications on electronic devices, graphene has shown great potential for nano-electromechanical systems. While interlayer interactions play a key role in modifying the electronic structures of layered materials, no attention has been given to their impact on electromechanica...

Designing "ideal electrodes" that simultaneously guarantee low mechanical damping and electrical loss as well as high electromechanical coupling in ultralow-volume piezoelectric nanomechanical structures can be considered to be a key challenge in the NEMS field. We show that mechanically transferred graphene, floating at van der Waals proximity, closely mimics "ideal electrodes" for ultrahigh f...

Abstract Coupled nanomechanical resonators are interesting for both fundamental studies and practical applications as they offer rich tunable oscillation dynamics. At present, the mechanical coupling in such systems is often mediated by a fixed geometry, joint clamping point of or displacement-dependent force. Here we show graphene-integrated electromechanical system consisting two physically s...

Due to the large coupling between their electrical and mechanical properties, ferroelectric ceramics are increasingly being implemented in novel devices. This review reports on recent advances in the development of predictive constitutive models for the coupled and non-linear electromechanical behavior of ferroelectrics. Such constitutive models are required to analyze the performance of ferroe...

This work presents an improved design that exploits dispersion matching to suppress the spurious modes in lithium niobate first-order antisymmetric (A1) Lamb wave mode resonators. The this is achieved by micro-machining thin film balance electrical and mechanical loadings of electrodes. In article, matchings A1 based on different metals are analytically modeled validated with finite-element ana...