Electro-mechanical coupling wave propagating in a locally resonant piezoelectric/elastic phononic crystal nanobeam with surface effects

Qian, Denghui

doi:10.1007/s10483-020-2586-5

Cited by 20 publications

(5 citation statements)

References 27 publications

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“…Studies on the coupling of piezoelectric PCs to complex external circuits are currently lacking. Some unique microstructures or related concepts such as resonance units have been introduced to promote an integrated design [ 37 , 38 , 39 , 40 , 41 , 42 ]. The topology optimization method was introduced into the design of piezoelectric PCs [ 43 ] to improve the acoustic characteristics of the structure.…”

Section: Structures Of Piezoelectric Phononic Crystalsmentioning

confidence: 99%

Advances in Tunable Bandgaps of Piezoelectric Phononic Crystals

Wang,

Xu,

2023

Materials

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Bandgaps of traditional phononic crystals (PCs) are determined using structural geometric parameters and material properties, and they are difficult to tune in practical applications. Piezoelectric PCs with lead zirconium titanate piezoelectric ceramics (abbreviated to piezoelectric PCs) have multi-physics coupling effects and their bandgaps can be tuned through external circuits to expand the application range of the PCs. First, the typical structures of piezoelectric PCs are summarized and analyzed. According to the structure, common tunable piezoelectric PCs can be roughly divided into three categories: PCs that only contain piezoelectric materials (single piezoelectric PCs), PCs composed of embedded piezoelectric materials in elastic materials (composite piezoelectric PCs), and PCs that are composed of an elastic base structure and attached piezoelectric patches (patch-type piezoelectric PCs). Second, the tuning methods of bandgaps for piezoelectric PCs are summarized and analyzed. Then, the calculation methods of the bandgaps of piezoelectric PCs are reviewed and analyzed. Finally, conclusions are drawn on the research status of piezoelectric PCs, shortcomings of the existing research are discussed, and future development directions are proposed.

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Section: Structures Of Piezoelectric Phononic Crystalsmentioning

confidence: 99%

Advances in Tunable Bandgaps of Piezoelectric Phononic Crystals

Wang,

Xu,

2023

Materials

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“…Based on 1D PWE method and the periodicity of PC nanobeam in x-direction [22] , functions ( ), ( ) and ( ) are expanded into spatial Fourier series:…”

Section: Fig 1 Model Of Lr Elastic/piezoelectric Pc Nanobeammentioning

confidence: 99%

Electro-Mechanical Coupling Properties of Band Gaps in an Elastic/Piezoelectric Phononic Crystal Nonlocal Nanobeam With Periodically Attached “spring-Mass” Resonators

Qian

Wang²,

2021

Preprint

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The model of a locally resonant (LR) epoxy/PZT-4 phononic crystal (PC) nanobeam with “spring-mass” resonators periodically attached on epoxy is proposed. The corresponding band structures are calculated by coupling Euler beam theory, nonlocal piezoelectricity theory and plane wave expansion (PWE) method. Three complete band gaps with widest total width less than 10GHz can be formed in the proposed nanobeam by comprehensively comparing the band structures of three kinds of LR PC nanobeams with resonators attached or not. Furthermore, influencing rules of the coupling fields between electricity and mechanics, “spring-mass” resonator, nonlocal effect and different geometric parameters on first three band gaps are discussed and summarized. All the investigations are expected to be applied to realize the active control of vibration in the region of ultrahigh frequency.

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“…Normally, strain is introduced by lattice mismatch [8] , impurity doping [9] , functional wrapping [10] as well as direct mechanical applications [5,11] in strain engineering. Thanks to strain engineering, tremendous achievements have been made, such as the turn of indirect band gap to direct band gap [12] , band gap opening [13] , enhancement of charge carrier mobility [14] , tune of the effective mass of carriers [15] , and transition of semiconductors to conductors [16] . To our knowledge, among the vast research about tuning the energy band structure via strain, the tune mechanism of the wurtzite structure ZnO, which combines the semiconducting and piezoelectric properties, still remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Electric potential and energy band in ZnO nanofiber tuned by local mechanical loading

Fan

Chen

2021

Appl. Math. Mech.-Engl. Ed.

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Recent success in strain engineering has triggered tremendous interest in its study and potential applications in nanodevice design. In this paper, we establish a coupled piezoelectric/semiconducting model for a wurtzite structure ZnO nanofiber under the local mechanical loading. The energy band structure tuned by the local mechanical loading and local length is calculated via an eight-band k · p method, which includes the coupling of valance and conduction bands. Poisson’s effect on the distribution of electric potential inversely depends on the local mechanical loading. Numerical results reveal that both the applied local mechanical loading and the local length exhibit obvious tuning effects on the electric potential and energy band. The band gap at band edges varies linearly with the applied loading. Changing the local length shifts the energy band which is far away from the band edges. This study will be useful in the electronic and optical enhancement of semiconductor devices.

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Electro-mechanical coupling wave propagating in a locally resonant piezoelectric/elastic phononic crystal nanobeam with surface effects

Cited by 20 publications

References 27 publications

Advances in Tunable Bandgaps of Piezoelectric Phononic Crystals

Advances in Tunable Bandgaps of Piezoelectric Phononic Crystals

Electro-Mechanical Coupling Properties of Band Gaps in an Elastic/Piezoelectric Phononic Crystal Nonlocal Nanobeam With Periodically Attached “spring-Mass” Resonators

Electric potential and energy band in ZnO nanofiber tuned by local mechanical loading

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