Molecular Dynamics Study on Structural Relaxation Processes in Amorphous Germanium

IF 0.5 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Journal of The Japan Institute of Metals Pub Date : 2017-04-14 DOI:10.2320/JINSTMET.J2016051
Shigetaka Imabayashi, M. Ishimaru
{"title":"Molecular Dynamics Study on Structural Relaxation Processes in Amorphous Germanium","authors":"Shigetaka Imabayashi, M. Ishimaru","doi":"10.2320/JINSTMET.J2016051","DOIUrl":null,"url":null,"abstract":"The structural relaxation of amorphous germanium was examined by molecular dynamics simulations based on the empirical Tersoff interatomic potential. Although the Tersoff potential overestimated both the melting and glass transition temperatures, it was able to reproduce the structural relaxation behavior. The potential energy decreases with thermal annealing below the glass transition temperature, but occasionally increases during structural relaxation. The mean square displacement of atoms also increases in these periods. These changes were attributed to cooperative atomic motion during the structural relaxation. Atomic trajectories revealed that structural changes are induced by spatiallyand temporally-inhomogeneous atomic motions: atomically mobile and immobile regions coexist during structural relaxation. [doi:10.2320/matertrans.M2017036]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":null,"pages":null},"PeriodicalIF":0.5000,"publicationDate":"2017-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Japan Institute of Metals","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.2320/JINSTMET.J2016051","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 2

Abstract

The structural relaxation of amorphous germanium was examined by molecular dynamics simulations based on the empirical Tersoff interatomic potential. Although the Tersoff potential overestimated both the melting and glass transition temperatures, it was able to reproduce the structural relaxation behavior. The potential energy decreases with thermal annealing below the glass transition temperature, but occasionally increases during structural relaxation. The mean square displacement of atoms also increases in these periods. These changes were attributed to cooperative atomic motion during the structural relaxation. Atomic trajectories revealed that structural changes are induced by spatiallyand temporally-inhomogeneous atomic motions: atomically mobile and immobile regions coexist during structural relaxation. [doi:10.2320/matertrans.M2017036]
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
非晶锗结构弛豫过程的分子动力学研究
基于经验Tersoff原子间势的分子动力学模拟研究了非晶态锗的结构弛豫。虽然Tersoff势高估了熔融温度和玻璃化转变温度,但它能够再现结构弛豫行为。在玻璃化转变温度以下,势能随热退火而减小,但在结构弛豫过程中偶尔增大。原子的均方位移也在这些周期内增加。这些变化归因于结构弛豫过程中的协同原子运动。原子轨迹揭示了结构变化是由空间和时间上的非均匀原子运动引起的:在结构弛豫过程中,原子可动区和不动区共存。(doi: 10.2320 / matertrans.M2017036)
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
Journal of The Japan Institute of Metals
Journal of The Japan Institute of Metals 工程技术-冶金工程
CiteScore
0.70
自引率
0.00%
发文量
27
审稿时长
6-12 weeks
期刊介绍: Information not localized
期刊最新文献
The Effect of Rhodium Addition on Degradation Behavior of Ir-10 mass%Rh Alloy during Oxidation at Elevated Temperatures Changes in Carburized Microstructures and Creep Properties of Nb-Added SCH13A Heat-Resistant Cast Steel due to Different Pouring Temperatures 高温プレスを利用した加工熱処理によるMg-9Al-1Zn-2Ca合金板の機械的特性向上 Ni基単結晶超合金TMS-238のデンドライト偏析とクリープ強度におよぼす溶体化熱処理の影響 Hydrogen and Materials Characteristic in Solids V
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1