Acoustic Modes at the Twist Boundary in Piezoelectric Crystals

The transformations of the shear (SH and SV) and longitudinal (L) acoustic waves at the twist boundary in piezoelectrics of ̅62 m and ̅42 m the and classes have been investigated. This boundary is formed at a hard contact between two identical crystal half-spaces rotated relative to each other aroun...

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Veröffentlicht in:Crystallography reports 2018-07, Vol.63 (4), p.627-632
Hauptverfasser: Lyubimov, V. N., Darinskii, A. N.
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description The transformations of the shear (SH and SV) and longitudinal (L) acoustic waves at the twist boundary in piezoelectrics of ̅62 m and ̅42 m the and classes have been investigated. This boundary is formed at a hard contact between two identical crystal half-spaces rotated relative to each other around the Z ||̅6||̅4 axis by an angle 2ϕ. Propagation occurs along the bisector of this angle ( х axis) in the ( x , y ) twist plane. Situations have been established in which the shear modes are localized at the twist boundary exclusively due to the combination of the piezoelectric effect and half-space rotation, as well as the joint effect of the elastic anisotropy and rotation. The cases of independence of a bulk wave of the half-space rotation and occurrence of leaky waves are described.
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subjects Crystallography and Scattering Methods
Elastic anisotropy
Half spaces
Leaky waves
Physical Properties of Crystals
Physics
Physics and Astronomy
Piezoelectric crystals
Piezoelectricity
Rotation
Twist boundaries
title Acoustic Modes at the Twist Boundary in Piezoelectric Crystals
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