Continuum Model for Coupled Acousto-Optical Phonons in Piezoelectric Materials

2018 ◽  
pp. 75-93
Author(s):  
Morten Willatzen ◽  
Zhong Lin Wang
Keyword(s):  
Continuum Model ◽  
Piezoelectric Materials ◽  
Optical Phonons

Continuum Model of Deformation of Piezoelectric Materials with Cracks

2015 ◽  
Vol 784 ◽  
pp. 161-172 ◽  
Author(s):  
Dmytro Babich ◽  
Olexander Bezverkhyi ◽  
Tatiana Dorodnykh
Keyword(s):  
Continuum Model ◽  
Continuous Medium ◽  
Piezoelectric Materials ◽  
Electric Energy ◽  
Deformation Energy ◽  
Principle Of Equivalence ◽  
Eshelby Method ◽  
The Continuum

The present paper addresses the continuum model describing deformation and accumulation of microdamages in electroelastic materials based on the generalized Eshelby principle. The microdamageability is considered as a process of appearance of flat elliptic or circular microcracks randomly dispersed over volume, the concentration of which increases with a load. The Eshelby method is based on the principle of equivalence of the deformation energy of fractured piezoelectric materials and the energy of medium, which is modeling these materials as a continuous medium. The key point of this approach is to determine the densities of the released elastic and electric energy.

Surface optical phonons as a probe of organic ligands on ZnO nanoparticles: An investigation using a dielectric continuum model and Raman spectrometry

2008 ◽  
Vol 77 (15) ◽  
Author(s):  
P.-M. Chassaing ◽  
F. Demangeot ◽  
V. Paillard ◽  
A. Zwick ◽  
N. Combe ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Continuum Model ◽  
Organic Ligands ◽  
Optical Phonons ◽  
Raman Spectrometry ◽  
Surface Optical ◽  
Dielectric Continuum ◽  
Dielectric Continuum Model

A continuum model for acoustic and optical phonons in heterostructures

2000 ◽  
Vol 116 (7) ◽  
pp. 385-388 ◽  
Author(s):  
B.K. Ridley ◽  
N.A. Zakhleniuk ◽  
M. Babiker
Keyword(s):  
Continuum Model ◽  
Optical Phonons

Continuum model of optical phonons in a nanotube

2001 ◽  
Vol 29 (6) ◽  
pp. 405-409 ◽  
Author(s):  
Michael A. Stroscio ◽  
Mitra Dutta ◽  
Daniel Kahn ◽  
Ki Wook Kim
Keyword(s):  
Continuum Model ◽  
Optical Phonons

Continuum model for long-wavelength optical phonons in cylinders: Application to carbon nanotubes

2004 ◽  
Vol 69 (3) ◽  
Author(s):  
L. Chico ◽  
R. Pérez-Álvarez
Keyword(s):  
Carbon Nanotubes ◽  
Continuum Model ◽  
Optical Phonons ◽  
Long Wavelength

Deformation of Electroelastic Materials with Dispersed Microdamageability

2015 ◽  
Vol 665 ◽  
pp. 145-148
Author(s):  
Dmytro Babich ◽  
O. Bezverkhyi ◽  
Tatiana Dorodnykh
Keyword(s):  
Energy Method ◽  
Continuum Model ◽  
Continuous Medium ◽  
Piezoelectric Materials ◽  
Electric Energy ◽  
Deformation Energy ◽  
Principle Of Equivalence ◽  
The Continuum

The present paper addresses the continuum model describing deformation electroelastic materials by using the generalized Eshelby principle. The energy method is based on the principle of equivalence of the deformation energy of fractured piezoelectric materials and the energy of medium, which is modeling these materials as a continuous medium. The key point of this approach is to determine the densities of the released elastic and electric energy.

Inelastic scattering at surfaces and interfaces

1986 ◽  
Vol 44 ◽  
pp. 392-393
Author(s):  
R. H. Ritchie ◽  
A. Howie
Keyword(s):  
Inelastic Scattering ◽  
Surface Properties ◽  
Correlation Energy ◽  
Condensed Matter ◽  
Charged Particles ◽  
Condensed Matter Physics ◽  
Optical Phonons ◽  
Exchange Correlation ◽  
Surfaces And Interfaces ◽  
Inelastic Interactions

An important part of condensed matter physics in recent years has involved detailed study of inelastic interactions between swift electrons and condensed matter surfaces. Here we will review some aspects of such interactions.Surface excitations have long been recognized as dominant in determining the exchange-correlation energy of charged particles outside the surface. Properties of surface and bulk polaritons, plasmons and optical phonons in plane-bounded and spherical systems will be discussed from the viewpoint of semiclassical and quantal dielectric theory. Plasmons at interfaces between dissimilar dielectrics and in superlattice configurations will also be considered.

Analysis of Sputtered Zinc Oxide Films

1980 ◽  
Vol 38 ◽  
pp. 416-417
Author(s):  
T. A. Emma ◽  
M. P. Singh
Keyword(s):  
Electron Microscopy ◽  
Zinc Oxide ◽  
Piezoelectric Materials ◽  
Oxide Films ◽  
Optical Quality ◽  
Zno Films ◽  
Rf Power ◽  
X Ray Diffraction ◽  
Sputtered Films ◽  
Zinc Oxide Films

Optical quality zinc oxide films have been characterized using reflection electron diffraction (RED), replication electron microscopy (REM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Significant microstructural differences were observed between rf sputtered films and planar magnetron rf sputtered films. Piezoelectric materials have been attractive for applications to integrated optics since they provide an active medium for signal processing. Among the desirable physical characteristics of sputtered ZnO films used for this and related applications are a highly preferred crystallographic texture and relatively smooth surfaces. It has been found that these characteristics are very sensitive to the type and condition of the substrate and to the several sputtering parameters: target, rf power, gas composition and substrate temperature.

Optical phonons with negative oscillator strength

2020 ◽  
Vol 190 (08) ◽  
Author(s):  
Evgenii A. Vinogradov
Keyword(s):  
Oscillator Strength ◽  
Optical Phonons
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