Correlation between vibrational anomalies and emergent anharmonicity of the local potential energy landscape in metallic glasses

doi:10.1103/PhysRevB.105.014204

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	Correlation between vibrational anomalies and emergent anharmonicity of the local potential energy landscape in metallic glasses
	Yang ZY(杨增宇); Wang YJ(王云江); Zaccone,Alessio
通讯作者	Wang, Yun-Jiang(yjwang@imech.ac.cn)
发表期刊	PHYSICAL REVIEW B
	2022-01-12
卷号	105 期号:1 页码:11
ISSN	2469-9950
摘要	The boson peak (BP) is a universal feature in the Raman and inelastic scattering spectra of both disordered and crystalline materials. Here, through a set of atomistically resolved characterizations of metallic glasses, we uncover a robust inverse proportionality between the intensity of the boson peak and the activation energy of excitations in the potential energy landscape (PEL). Larger boson peaks are linked with shallower basins and lower activation barriers and, consequently, with emergent anharmonic sectors of the PEL. Numerical evidence from atomistic simulations indicates that THz atomic vibrations contributing the most to the BP in atomic glasses are strongly correlated with such emergent anharmonicity of the PEL, as evidenced through very large values of the atomic- and mode-resolved Gruneisen parameter found for the atomic vibrations that constitute the BP. These results provide a direct bridge between the vibrational spectrum and the topology of the PEL in amorphous solids.
DOI	10.1103/PhysRevB.105.014204
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000752506500001
关键词[WOS]	BOSON-PEAK ; COOPERATIVE MOTION ; RAMAN-SCATTERING ; DYNAMICS ; CRYSTALS ; SOUND ; CONDUCTIVITY ; ATTENUATION ; RELAXATION ; ELASTICITY
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
资助项目	National Natural Science Foundation of China[12072344] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017025] ; U.S. Army Research Office[W911NF-19-2-0055]
项目资助者	National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; U.S. Army Research Office
论文分区	二类
力学所作者排名	1
RpAuthor	Wang, Yun-Jiang
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/88582
专题	非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Yang ZY,Wang YJ,Zaccone,Alessio. Correlation between vibrational anomalies and emergent anharmonicity of the local potential energy landscape in metallic glasses[J]. PHYSICAL REVIEW B,2022,105,1,:11.
APA	杨增宇,王云江,&Zaccone,Alessio.(2022).Correlation between vibrational anomalies and emergent anharmonicity of the local potential energy landscape in metallic glasses.PHYSICAL REVIEW B,105(1),11.
MLA	杨增宇,et al."Correlation between vibrational anomalies and emergent anharmonicity of the local potential energy landscape in metallic glasses".PHYSICAL REVIEW B 105.1(2022):11.

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