Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.63.314 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Static Electro-Mechanical Response of Axisymmetric One-Dimensional Piezoelectric Quasicrystal Circular Actuator.
Materials (Basel)
April 2022
College of Mechanical and Power Engineering, Yingkou Institute of Technology, Yingkou 115014, China.
The piezoelectric effect of piezoelectric quasicrystalline materials is coexcited by phonon and phason fields. Piezoelectric quasicrystalline materials have excellent properties of both piezoelectric materials and quasicrystalline materials, which are expected to be used as actuators in the fields of aerospace, automotive, and intelligent manufacturing. Based on the three-dimensional elastic theory of piezoelectric quasicrystals, the state space equation for axisymmetric piezoelectric quasicrystal circular plate actuators is derived by using the state space method.
View Article and Find Full Text PDFDegradation of Phonons in Disordered Moiré Superlattices.
Phys Rev Lett
February 2022
School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
The elastic collective modes of a moiré superlattice arise not from vibrations of a rigid crystal but from the relative displacement between the constituent layers. Despite their similarity to acoustic phonons, these modes, called phasons, are not protected by any conservation law. Here, we show that disorder in the relative orientation between the layers and thermal fluctuations associated with their sliding motion degrade the propagation of sound in the moiré superlattice.
View Article and Find Full Text PDFAtomic structure and phason modes of the Sc-Zn icosahedral quasicrystal.
IUCrJ
July 2016
Université Grenoble Alpes, SIMAP, Grenoble F-38000, France; CNRS, SIMAP, Grenoble F-38000, France.
The detailed atomic structure of the binary icosahedral (i) ScZn7.33 quasicrystal has been investigated by means of high-resolution synchrotron single-crystal X-ray diffraction and absolute scale measurements of diffuse scattering. The average atomic structure has been solved using the measured Bragg intensity data based on a six-dimensional model that is isostructural to the i-YbCd5.
View Article and Find Full Text PDFConfirmation of the random tiling hypothesis for a decagonal quasicrystal.
Phys Rev Lett
November 2012
Institut für Theoretische und Angewandte Physik, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany.
Mechanisms that stabilize quasicrystals are much discussed but not finally resolved. We confirm the random tiling hypothesis and its predictions in a fully atomistic decagonal quasicrystal model by calculating the free energy and the phason elastic constants over a wide range of temperatures. The Frenkel-Ladd method is applied for the phonon part, and an approach of uncorrelated phason flips is applied for the configurational part.
View Article and Find Full Text PDFGeneralized dynamics of moving dislocations in quasicrystals.
J Phys Condens Matter
December 2010
Emmy Noether Research Group, Department of Physics, Darmstadt University of Technology, Hochschulstraße 6, D-64289 Darmstadt, Germany.
A theoretical framework for dislocation dynamics in quasicrystals is provided according to the continuum theory of dislocations. Firstly, we present the fundamental theory for moving dislocations in quasicrystals giving the dislocation density tensors and introducing the dislocation current tensors for the phonon and phason fields, including the Bianchi identities. Next, we give the equations of motion for the incompatible elastodynamics as well as for the incompatible elasto-hydrodynamics of quasicrystals.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!