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Proposal and analysis of a ferromagnetic triple-barrier resonant-tunneling spin filter
| Title: | Proposal and analysis of a ferromagnetic triple-barrier resonant-tunneling spin filter |
| Authors: | Uemura, T.1 Browse this author →KAKEN DB | | Marukame, T. Browse this author | | Yamamoto, M. Browse this author →KAKEN DB |
| Authors(alt): | 植村, 哲也1 |
| Issue Date: | Sep-2003 |
| Publisher: | IEEE |
| Journal Title: | IEEE Transactions on Magnetics |
| Volume: | 39 |
| Issue: | 5 |
| Start Page: | 2809 |
| End Page: | 2811 |
| Publisher DOI: | 10.1109/TMAG.2003.815719 |
| Abstract: | 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: | http://www.aip.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/5578 |
| Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 植村 哲也
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