research article
Topological insulator based locally resonant phononic crystals: wave propagation and acoustic band gaps
Abstract
ABSTRACT: In the present work the acoustic band structure of a two-dimensional phononic crystal (PC) containing an organic ferroelectric (PVDF- polyvinylidene fluoride) and topological insulator (Bi2Te3) were investigated by the plane-wave-expansion (PWE) method. Two-dimensional PC with square lattices composed of Bi2Te3 cylindrical rods embedded in the PVDF matrix are studied to find the existence of stop bands for the waves of certain energy. Phononic band diagram ω = ω(k) for a 2D PC along the Г-X-M-Г path in the square Brillouin zone show four stop bands in the frequency range 0.01–8.0 kHz- Article
- Acoustic band gaps
- Phononic crystals
- Topological insulator
- Wave propagation
- Acoustic devices
- Acoustics
- Crystal structure
- Electric insulators
- Energy gap
- Phonons
- Cylindrical rod
- Frequency ranges
- Plane wave expansion method
- Polyvinylidene fluorides
- Topological insulators
- Two-Dimensional Phononic Crystals
- Acoustic wave propagation
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Last time updated on 17/04/2018
This paper was published in Bilkent University Institutional Repository.
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