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Proposal and analysis of a ferromagnetic triple-barrier resonant-tunneling spin filter

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タイトル: Proposal and analysis of a ferromagnetic triple-barrier resonant-tunneling spin filter
著者: Uemura, T 著作を一覧する
Marukame, T 著作を一覧する
Yamamoto, M 著作を一覧する
発行日: 2003年 9月
出版者: IEEE
誌名: IEEE Transactions on Magnetics
巻: 39
号: 5
開始ページ: 2809
終了ページ: 2811
出版社 DOI: 10.1109/TMAG.2003.815719
抄録: A novel spin filter consisting of a triple-barrier resonant tunneling system in the form F/I/N/I/F/I/F is proposed, where F, I, and N represent a ferromagnetic material, an insulator, and a nonmagnetic material, respectively. The spin-dependent tunneling current in the triple-barrier resonant tunneling system is calculated theoretically on the basis of a Tsu-Esaki formula to investigate the output tunnel current polarization. Detailed calculations using the GaMnAs/AlAs/GaAs material system show that the two clear split peaks originating from up- and down-spin holes appear in the current-voltage (I-V) curve due to spin splitting of the energy levels formed in the ferromagnetic quantum well. The polarization can reach more than 98% at the peak positions in the I-V curve.
Rights: Copyright © 2003 American Institute of Physics
Relation (URI):
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 植村 哲也


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