WEKO3
アイテム
Odd-frequency pairs and Josephson current through a strong ferromagnet
http://hdl.handle.net/2237/11285
http://hdl.handle.net/2237/1128541159323-055d-4842-abd5-9324f38ebc74
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
PhysRevB_76_224525.pdf (668.8 kB)
|
|
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2009-03-10 | |||||
| タイトル | ||||||
| タイトル | Odd-frequency pairs and Josephson current through a strong ferromagnet | |||||
| 言語 | en | |||||
| 著者 |
Asano, Yasuhiro
× Asano, Yasuhiro× Sawa, Yuki× Tanaka, Yukio× Golubov, Alexander A. |
|||||
| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | American Physical Society, All rights reserved. | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Cooper pairs | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | critical current density (superconductivity) | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | electronic density of states | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | exchange interactions (electron) | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | ferromagnetic materials | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Green's function methods | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | interface states | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Josephson effect | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | magnetic superconductors | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | mesoscopic systems | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | quasiparticles | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | scanning tunnelling microscopy | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | spin fluctuations | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | triplet state | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We study Josephson current in superconductor/diffusive ferromagnet/superconductor junctions by using the recursive Green function method. When the exchange potential in a ferromagnet is sufficiently large compared to the pair potential in a superconductor, an ensemble average of Josephson current is much smaller than its mesoscopic fluctuations. The Josephson current vanishes when the exchange potential is extremely large so that a ferromagnet is half-metallic. Spin-flip scattering at junction interfaces drastically changes the characteristic behavior of Josephson current. In addition to spin-singlet Cooper pairs, equal-spin triplet pairs penetrate into a half metal. Such equal-spin pairs have an unusual symmetry property called odd-frequency symmetry and carry the Josephson current through a half metal. The penetration of odd-frequency pairs into a half metal enhances the low energy quasiparticle density of states, which could be detected experimentally by scanning tunneling spectroscopy. We will also show that odd-frequency pairs in a half metal cause a nonmonotonic temperature dependence of the critical Josephson current. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | American Physical Society | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | journal article | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1103/PhysRevB.76.224525 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 1098-0121 | |||||
| 書誌情報 |
en : PHYSICAL REVIEW B 巻 76, 号 22, p. 224525-224525, 発行日 2007-12 |
|||||
| フォーマット | ||||||
| 値 | application/pdf | |||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/11285 | |||||
| 識別子タイプ | HDL | |||||
