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https://hdl.handle.net/20.500.14094/90004865
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2024-04-25
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90004865 (fulltext)
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メタデータID
90004865
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open access
出版タイプ
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タイトル
Assessing the Nature of the Distribution of Localised States in Bulk GaAsBi
著者
Wilson, Tom ; Hylton, Nicholas P. ; Harada, Yukihiro ; Pearce, Phoebe ; Alonso-Alvarez, Diego ; Mellor, Alex ; Richards, Robert D. ; David, John P. R. ; Ekins-Daukes, Nicholas J.
著者名
Wilson, Tom
著者名
Hylton, Nicholas P.
著者ID
A0963
研究者ID
1000010554355
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=c641b750fb455c8a520e17560c007669
著者名
Harada, Yukihiro
原田, 幸弘
ハラダ, ユキヒロ
所属機関名
工学研究科
著者名
Pearce, Phoebe
著者名
Alonso-Alvarez, Diego
著者名
Mellor, Alex
著者名
Richards, Robert D.
著者名
David, John P. R.
著者名
Ekins-Daukes, Nicholas J.
収録物名
Scientific Reports
巻(号)
8
ページ
6457-6457
出版者
Nature Publishing Group
刊行日
2018-04-24
公開日
2018-05-16
抄録
A comprehensive assessment of the nature of the distribution of sub band-gap energy states in bulk GaAsBi is presented using power and temperature dependent photoluminescence spectroscopy. The observation of a characteristic red-blue-red shift in the peak luminescence energy indicates the presence of short-range alloy disorder in the material. A decrease in the carrier localisation energy demonstrates the strong excitation power dependence of localised state behaviour and is attributed to the filling of energy states furthest from the valence band edge. Analysis of the photoluminescence lineshape at low temperature presents strong evidence for a Gaussian distribution of localised states that extends from the valence band edge. Furthermore, a rate model is employed to understand the non-uniform thermal quenching of the photoluminescence and indicates the presence of two Gaussian-like distributions making up the density of localised states. These components are attributed to the presence of microscopic fluctuations in Bi content, due to short-range alloy disorder across the GaAsBi layer, and the formation of Bi related point defects, resulting from low temperature growth.
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工学研究科
学術雑誌論文
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© The Author(s) 2018.
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
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資源タイプ
journal article
言語
English (英語)
eISSN
2045-2322
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関連情報
DOI
https://doi.org/10.1038/s41598-018-24696-2
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