Dirac Cone Characteristics of Hexachiral Phononic Crystal

The band structure properties of phononic crystal is important to evaluate the vibration and noise reduction of acoustic metamaterials. Taking the 2D hexachiral phononic crystal as an example, the band structure and Dirac cone properties were investigated by numerical analysis, and the four-fold acc...

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Autor principal:	CHEN Luyun, WANG Jian, CUI Yifeng, KONG Hui
Formato:	article
Lenguaje:	ZH
Publicado:	Editorial Office of Journal of Shanghai Jiao Tong University 2021
Materias:	phononic crystal band structure dirac cone linear dispersion directional band gap Engineering (General). Civil engineering (General) TA1-2040 Chemical engineering TP155-156 Naval architecture. Shipbuilding. Marine engineering VM1-989
Acceso en línea:	https://doaj.org/article/1eef377820b04f32b214824a21ae5215
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id	oai:doaj.org-article:1eef377820b04f32b214824a21ae5215
record_format	dspace
spelling	oai:doaj.org-article:1eef377820b04f32b214824a21ae52152021-12-03T02:59:23ZDirac Cone Characteristics of Hexachiral Phononic Crystal1006-246710.16183/j.cnki.jsjtu.2020.242https://doaj.org/article/1eef377820b04f32b214824a21ae52152021-11-01T00:00:00Zhttp://xuebao.sjtu.edu.cn/article/2021/1006-2467/1006-2467-55-11-1453.shtmlhttps://doaj.org/toc/1006-2467The band structure properties of phononic crystal is important to evaluate the vibration and noise reduction of acoustic metamaterials. Taking the 2D hexachiral phononic crystal as an example, the band structure and Dirac cone properties were investigated by numerical analysis, and the four-fold accidental degenerate Dirac point was obtained in the center of Brillouin zone. By adjusting the design parameters of ligament structure, a double Dirac cone was broken and a novel directional band gap was formed. The influence of geometric parameters on the directional band gaps width was investigated, and the band structure inversion problem was further discussed. This research can provide support for the application of hexachiral phononic crystal in elastic wave manipulation and acoustic topological insulator.CHEN Luyun, WANG Jian, CUI Yifeng, KONG HuiEditorial Office of Journal of Shanghai Jiao Tong Universityarticlephononic crystalband structuredirac conelinear dispersiondirectional band gapEngineering (General). Civil engineering (General)TA1-2040Chemical engineeringTP155-156Naval architecture. Shipbuilding. Marine engineeringVM1-989ZHShanghai Jiaotong Daxue xuebao, Vol 55, Iss 11, Pp 1453-1458 (2021)
institution	DOAJ
collection	DOAJ
language	ZH
topic	phononic crystal band structure dirac cone linear dispersion directional band gap Engineering (General). Civil engineering (General) TA1-2040 Chemical engineering TP155-156 Naval architecture. Shipbuilding. Marine engineering VM1-989
spellingShingle	phononic crystal band structure dirac cone linear dispersion directional band gap Engineering (General). Civil engineering (General) TA1-2040 Chemical engineering TP155-156 Naval architecture. Shipbuilding. Marine engineering VM1-989 CHEN Luyun, WANG Jian, CUI Yifeng, KONG Hui Dirac Cone Characteristics of Hexachiral Phononic Crystal
description	The band structure properties of phononic crystal is important to evaluate the vibration and noise reduction of acoustic metamaterials. Taking the 2D hexachiral phononic crystal as an example, the band structure and Dirac cone properties were investigated by numerical analysis, and the four-fold accidental degenerate Dirac point was obtained in the center of Brillouin zone. By adjusting the design parameters of ligament structure, a double Dirac cone was broken and a novel directional band gap was formed. The influence of geometric parameters on the directional band gaps width was investigated, and the band structure inversion problem was further discussed. This research can provide support for the application of hexachiral phononic crystal in elastic wave manipulation and acoustic topological insulator.
format	article
author	CHEN Luyun, WANG Jian, CUI Yifeng, KONG Hui
author_facet	CHEN Luyun, WANG Jian, CUI Yifeng, KONG Hui
author_sort	CHEN Luyun, WANG Jian, CUI Yifeng, KONG Hui
title	Dirac Cone Characteristics of Hexachiral Phononic Crystal
title_short	Dirac Cone Characteristics of Hexachiral Phononic Crystal
title_full	Dirac Cone Characteristics of Hexachiral Phononic Crystal
title_fullStr	Dirac Cone Characteristics of Hexachiral Phononic Crystal
title_full_unstemmed	Dirac Cone Characteristics of Hexachiral Phononic Crystal
title_sort	dirac cone characteristics of hexachiral phononic crystal
publisher	Editorial Office of Journal of Shanghai Jiao Tong University
publishDate	2021
url	https://doaj.org/article/1eef377820b04f32b214824a21ae5215
work_keys_str_mv	AT chenluyunwangjiancuiyifengkonghui diracconecharacteristicsofhexachiralphononiccrystal
_version_	1718373919226855424

Dirac Cone Characteristics of Hexachiral Phononic Crystal

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