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Phonon dynamics in 3D quasicrystals versus amorphous solids

文献类型：期刊论文

作者Cao LL(曹琳莉)1,2; Zhao K(赵坤)1,2; Wang YJ(王云江)1,2
刊名JOURNAL OF APPLIED PHYSICS
出版日期2025-02-07
卷号137期号:5页码:11
ISSN号0021-8979
DOI10.1063/5.0245461
通讯作者Wang, Yun-Jiang(yjwang@imech.ac.cn)
英文摘要Quasicrystals (QCs) possess a unique long-range quasi-periodic order distinct from both crystalline and amorphous solids. The vibrational properties of QCs remain poorly unexplored. Here, we employed classical molecular dynamics simulations to investigate the phonon dynamics of a 3D single-component icosahedral QC model and a Kob-Andersen (KA) glass model. By comparing the vibrational density of state (VDOS), phonon dispersion, and phonon lifetime, we elucidate the impact of structural order on the phonon dynamics. Although QC shows similar phonon dynamics to amorphous solid rather than crystals, our findings reveal significant differences between the two systems. The VDOS of the QC exhibits a double-peak feature and a "fake" boson peak compared to the KA glass. The phonon dispersion in the QC displays more pronounced elastic anisotropy, with well-defined transverse and longitudinal modes, unlike the more isotropic dispersion in the KA glass. Moreover, the correlation between the transverse phonon linewidth and the structure factor, observed in the KA glass, is absent in the QC. Phonon lifetimes in the QC are generally longer than in the KA glass, with a faster decay rate. This comparative study highlights the distinctive vibrational properties of 3D QCs, emphasizing the role of structural order in determining phonon behaviors in solids.
分类号二类
WOS关键词METALLIC GLASSES ; ATOMIC DYNAMICS ; MODES
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB0620103] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB0510301] ; National Natural Science Foundation of China (NNSFC)[12472112]
WOS研究方向Physics
语种英语
WOS记录号WOS:001416711100001
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China (NNSFC)
其他责任者王云江
源URL[http://dspace.imech.ac.cn/handle/311007/100068]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
推荐引用方式
GB/T 7714		 Cao LL,Zhao K,Wang YJ. Phonon dynamics in 3D quasicrystals versus amorphous solids[J]. JOURNAL OF APPLIED PHYSICS,2025,137(5):11.
APA 曹琳莉,赵坤,&王云江.(2025).Phonon dynamics in 3D quasicrystals versus amorphous solids.JOURNAL OF APPLIED PHYSICS,137(5),11.
MLA 曹琳莉,et al."Phonon dynamics in 3D quasicrystals versus amorphous solids".JOURNAL OF APPLIED PHYSICS 137.5(2025):11.

入库方式： OAI收割

来源：力学研究所

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