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Title:
Universal structural softening in metallic glasses indicated by boson heat capacity peak
Author: Jiang MQ(蒋敏强); Peterlechner M; Wang YJ(王云江); Wang WH(汪卫华); Jiang F; Dai LH(戴兰宏); Wilde G
Source: APPLIED PHYSICS LETTERS
Issued Date: 2017-12-25
Volume: 111, Issue:26
Abstract:

Low-temperature heat capacity is systematically investigated in various glassy and crystalline polymorphs of a wide range of metallic glasses. We reveal that the boson heat capacity peak beyond the Debye level arises from both excess phonon scattering and background electronic excitation, and the two contributions are strongly coupled and also material-dependent. It is interesting to observe that the boson heat capacity peaks obey an inversely linear correlation between their heights and characteristic positions, which is mainly dominated by phonic anomalies. This indicates a universal structural softening among the studied glasses when the boson peak occurs. We further suggest a possibility that the linear evolution of the fast boson peaks can probe into the slow structural softening across the glass transition, and the two dynamic processes are controlled by the short-time shear modulus associated with local soft regions in fragile glasses. Published by AIP Publishing.

Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Jiang, MQ, Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
DOI: 10.1063/1.5016984
DOC Type: Article
WOS Subject: Physics, Applied
WOS Subject Extended: Physics
WOS Keyword Plus: TEMPERATURE SPECIFIC-HEAT ; THERMAL-CONDUCTIVITY ; CRYSTALLIZATION ; SCATTERING
WOS ID: WOS:000418947200013
ISSN: 0003-6951
Funder: National Natural Science Foundation of China(11522221 ; Strategic Priority Research Program(XDB22040303) ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(QYZDJSSW-JSC011) ; D.F.G.(Wi 1899/27-2 ; 11790292 ; SPP1594) ; 11372315)
Classification: 二类/Q1
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/72225
Appears in Collections:非线性力学国家重点实验室_期刊论文

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Recommended Citation:
Jiang MQ,Peterlechner M,Wang YJ,et al. Universal structural softening in metallic glasses indicated by boson heat capacity peak[J]. APPLIED PHYSICS LETTERS,2017-12-25,111(26).
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