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このアイテムの引用には次の識別子を使用してください:
http://hdl.handle.net/10119/10837
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| タイトル: | Dual spin filter effect in a zigzag graphene nanoribbon |
| 著者: | Ozaki, Taisuke
Nishio, Kengo
Weng, Hongming
Kino, Hiori |
| キーワード: | zigzag graphene nanoribbon
Dual spin filter effect
Wannier functions
tight-binding model
electronic structure calculations |
| 発行日: | 2010-02-17 |
| 出版者: | American Physical Society |
| 誌名: | Physical Review B |
| 巻: | 81 |
| 号: | 7 |
| 開始ページ: | 075422-1 |
| 終了ページ: | 075422-5 |
| DOI: | 10.1103/PhysRevB.81.075422 |
| 抄録: | By first principle calculations, a dual spin filter effect under finite bias voltages is demonstrated in an antiferromagnetic junction of symmetric zigzag graphene nanoribbon (ZGNR). Unlike conventional spin filter devices using half metallic materials, the up and down-spin electrons are unidirectionally filtered in the counter direction of the bias voltage, making the junction a dual spin filter. On the contrary, asymmetric ZGNRs do not exhibit such a spin filter effect. By analyzing Wannier functions and a tight-binding model, we clarify that an interplay between the spin polarized band structure of π and π^∗ states near the Fermi level and decoupling of the interband hopping of the two states, arising from the symmetry of the wave functions, plays a crucial role in the effect. |
| Rights: | Taisuke Ozaki, Kengo Nishio, Hongming Weng, and Hiori Kino, Physical Review B, 81(7), 2010, 075422-1-075422-5. Copyright 2010 by the American Physical Society. http://dx.doi.org/10.1103/PhysRevB.81.075422 |
| URI: | http://hdl.handle.net/10119/10837 |
| 資料タイプ: | publisher |
| 出現コレクション: | z10-10-1. 雑誌掲載論文 (Journal Articles)
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