On Rayleigh waves in a piezoelectric semiconductor thin film over an elastic half-space

Tian, Ruixue; Nie, Guoquan; Liu, Jinxi; Pan, Ernian; Wang, Yue-Sheng

doi:10.1016/j.ijmecsci.2021.106565

Cited by 45 publications

(16 citation statements)

References 41 publications

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“…In the numerical examples, we mainly consider PSC ZnO. The material properties are listed in Table 1 [10,29], and the assumption, μ 11 n = μ 33 n , μ 11 p = μ 33 p and d 11 n = d 33 n , d 11 p = d 33 p , adopted in the literature [11], is still retained here. We choose H = 10 −4 m to be the thickness of the covering layer.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

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Rayleigh wave in layered piezoelectric semiconductor with consideration of PN junction effects

Wei

et al. 2022

Mathematics and Mechanics of Solids

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In this paper, analytical solutions for Rayleigh wave in a transversely isotropic piezoelectric semiconductor (PSC) substrate with a covering layer of different type doping are obtained. The PN junction (called also the depletion layer), which is created by the diffusion and drifting due to the different doping type of the substrate and the covering layer, can be considered as an electrically gradient layer between the covering layer and the substrate. Making use of the state transfer equation method, the transfer matrix of the state vector of the depletion layer is derived mathematically. Based on the numerical calculations, we investigate the physical influences of the covering layer, electric boundary conditions and doping concentrations on the dispersion and attenuation, and the effects of PN junction on the wave-mode shapes. Our results show that the semiconductor will slow the Rayleigh waves and induce the attenuation. Both the phase velocity and attenuation are dependent upon the frequency. The existence of PN junction has less influences on the dispersion and attenuation but relatively large influences on the wave-mode shapes, especially, on the electric potential, carriers concentration, electric displacement, and the current density of carriers.

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Section: Numerical Results and Discussionmentioning

confidence: 99%

“…The material constants of ZnO[10,29]. ij : GPa; e ij : C/m 2 ; r: kg/m 3 ; d ij : m 2 /s; m ij : m 2 /Vs; e ij : 10 211 C/Vm; q: 10 219 C; n i : 10 16 /m 3 .…”

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Rayleigh wave in layered piezoelectric semiconductor with consideration of PN junction effects

Wei

et al. 2022

Mathematics and Mechanics of Solids

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“…Moreover, previous studies have been focused on rigid SAW devices based on the brittle lithium niobate (LiNbO 3 ) for enriching [44], aligning [36], and patterning [37] microparticles and cells. Whereas so far there are no reports on using flexible thin film SAW devices, which have advantages such as easy integration with microelectronics and other technologies, high power and high speed capabilities [56], and potential applications in flexible microfluidic platforms, body conforming wearable devices, and soft robotics [57][58][59][60].…”

Section: Introductionmentioning

confidence: 99%

Acoustofluidic Patterning inside Capillary Tubes Using Standing Surface Acoustic Waves

Maramizonouz

Jia

Rahmati

et al. 2022

International Journal of Mechanical Sciences

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“…The vast majority of mathematical models for coated structures assume a perfect contact between the coating and the substrate in various scenarios, e.g. see [11][12][13][14]. At the same time, only a few papers analyse a sliding contact.…”

Section: Introductionmentioning

confidence: 99%

Elastodynamics of a coated half-space under a sliding contact

Bratov

Kaplunov

Lapatsin

et al. 2022

Mathematics and Mechanics of Solids

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The paper deals with elastic wave propagating in a layer on a half-space induced by a vertical force. The focus is on the effect of a sliding contact along the interface and its comparative study with a perfect one. The effective boundary conditions substituting the presence of the layer are derived. The leading order term in these conditions corresponds to vertical inertia of the layer, whereas next order correction involves the effect of plate waves in the coating. Analysis of the associated dispersion relation confirms the existence of a Rayleigh-type wave, along with extensional and shear plate waves. An asymptotic hyperbolic-elliptic formulation for surface wave field is also presented. This includes a hyperbolic equation singularly perturbed by a pseudo-differential operator playing a role of a boundary condition for the elliptic equation governing decay over the interior. The sign of the coefficient at the pseudo-differential operator is demonstrated to be always negative, corresponding to a local maximum of the phase speed at zero wave number, and consequently to a distinct receding type of the Rayleigh-type wave quasi-front induced by an impulse load.

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On Rayleigh waves in a piezoelectric semiconductor thin film over an elastic half-space

Cited by 45 publications

References 41 publications

Rayleigh wave in layered piezoelectric semiconductor with consideration of PN junction effects

Rayleigh wave in layered piezoelectric semiconductor with consideration of PN junction effects

Acoustofluidic Patterning inside Capillary Tubes Using Standing Surface Acoustic Waves

Elastodynamics of a coated half-space under a sliding contact

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