UTokyo Repository 東京大学
 

UTokyo Repository >
113 工学系研究科・工学部 >
22 電気系工学専攻 >
1132210 学術雑誌論文 >

このページ(論文)をリンクする場合は次のURLを使用してください: http://hdl.handle.net/2261/61295

タイトル: Observation of spontaneous spin-splitting in the band structure of an n-type zinc-blende ferromagnetic semiconductor
著者: Anh, Le Duc
Hai, Pham Nam
Tanaka, Masaaki
キーワード: Electronic devices
Ferromagnetism
Spintronics
発行日: 2016年12月19日
出版者: Nature Publishing Group
掲載誌情報: Le Duc Anh, Pham Nam Hai and Masaaki Tanaka, "Observation of spontaneous spin-splitting in the band structure of an n-type zinc-blende ferromagnetic semiconductor", Nature Communications Online Edition: 2016 /12/19 (Japan time), doi:10.1038/ncomms13810.
関連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
http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/study-picks-up-large-spontaneous-spin-splitting-in-the-energy-band-structure.html
http://www.nature.com/articles/ncomms13810
抄録: 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: 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
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
URI: http://hdl.handle.net/2261/61295
ISSN: 2041-1723
出現カテゴリ:014 自然科学
1132210 学術雑誌論文

この論文のファイル:

ファイル 記述 サイズフォーマット
ncomms13810.pdf1.52 MBAdobe PDF見る/開く

本リポジトリに保管されているアイテムはすべて著作権により保護されています。

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - ご意見をお寄せください