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Observation of spontaneous spin-splitting in the band structure of an n-type zinc-blende ferromagnetic semiconductor
http://hdl.handle.net/2261/61295
http://hdl.handle.net/2261/61295593b5219-affd-4645-b3bb-7ef62d3c88f6
名前 / ファイル | ライセンス | アクション |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2017-01-05 | |||||
タイトル | ||||||
タイトル | Observation of spontaneous spin-splitting in the band structure of an n-type zinc-blende ferromagnetic semiconductor | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題 | Electronic devices | |||||
主題Scheme | Other | |||||
キーワード | ||||||
主題 | Ferromagnetism | |||||
主題Scheme | Other | |||||
キーワード | ||||||
主題 | Spintronics | |||||
主題Scheme | Other | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Anh, Le Duc
× Anh, Le Duc× Hai, Pham Nam× Tanaka, Masaaki |
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著者所属 | ||||||
著者所属 | Department of Electrical Engineering and Information Systems, The University of Tokyo | |||||
著者所属 | ||||||
著者所属 | Institute of Engineering Innovation, Graduate School of Engineering, The University of Tokyo | |||||
著者所属 | ||||||
著者所属 | Department of Physical Electronics, Tokyo Institute of Technology | |||||
著者所属 | ||||||
著者所属 | Center for Spintronics Research Network (CSRN), The University of Tokyo | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Large spin-splitting in the conduction band and valence band of ferromagnetic semiconductors, predicted by the influential mean-field Zener model and assumed in many spintronic device proposals, has never been observed in the mainstream p-type Mn-doped ferromagnetic semiconductors. Here, using tunnelling spectroscopy in Esaki-diode structures, we report the observation of such a large spontaneous spin-splitting energy (31.7–50 meV) in the conduction band bottom of n-type ferromagnetic semiconductor (In,Fe)As, which is surprising considering the very weak s-d exchange interaction reported in several zinc-blende type semiconductors. The mean-field Zener model also fails to explain consistently the ferromagnetism and the spin-splitting energy of (In,Fe)As, because we found that the Curie temperature values calculated using the observed spin-splitting energies are much lower than the experimental ones by a factor of 400. These results urge the need for a more sophisticated theory of ferromagnetic semiconductors. | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | UTokyo Research掲載「スピン状態によって大きなエネルギー差が自発的に生ずるエネルギー帯構造を観測」 URI: http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/study-picks-up-large-spontaneous-spin-splitting-in-the-energy-band-structure.html | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | UTokyo Research "Study picks up large spontaneous spin splitting in the energy band structure" URI: http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/study-picks-up-large-spontaneous-spin-splitting-in-the-energy-band-structure.html | |||||
書誌情報 |
Nature communications 巻 7, p. 13810, 発行日 2016-12-19 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2041-1723 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12645905 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1038/ncomms13810 | |||||
権利 | ||||||
権利情報 | © The Author(s) 2016. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | Springer Nature | |||||
関係URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/study-picks-up-large-spontaneous-spin-splitting-in-the-energy-band-structure.html | |||||
関係URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/study-picks-up-large-spontaneous-spin-splitting-in-the-energy-band-structure.html | |||||
関係URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | http://www.nature.com/articles/ncomms13810 |