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Theory of macroscopic quantum tunneling in high-T_c c-axis Josephson junctions
http://hdl.handle.net/2237/11286
http://hdl.handle.net/2237/112865fce2801-5ab5-4aa2-a57b-5cc4f1c6d305
名前 / ファイル | ライセンス | アクション |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2009-03-10 | |||||
タイトル | ||||||
タイトル | Theory of macroscopic quantum tunneling in high-T_c c-axis Josephson junctions | |||||
言語 | en | |||||
著者 |
Yokoyama, Takehito
× Yokoyama, Takehito× Kawabata, Shiro× Kato, Takeo× Tanaka, Yukio |
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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 | high-temperature superconductors | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Josephson effect | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | quantum theory | |||||
抄録 | ||||||
内容記述 | We study macroscopic quantum tunneling (MQT) in c-axis twist Josephson junctions made of high-Tc superconductors in order to clarify the influence of the anisotropic order parameter symmetry (OPS) on MQT. The dependence of the MQT rate on the twist angle γ about the c axis is calculated by using the functional integral and the bounce method. Due to the d-wave OPS, the γ dependence of standard deviation of the switching current distribution and the crossover temperaturefrom thermal activation to MQT are found to be given by cos 2γ and sqrt(cos 2 γ ), respectively. We also show that a dissipative effect resulting from the nodal quasiparticle excitation on MQT is negligibly small, which is consistent with recent MQT experiments using Bi_2Sr_2CaCu_2O_8+δ intrinsic junctions. These results indicate that MQT in c-axis twist junctions becomes a useful experimental tool for testing the OPS of high-T_c materials at low temperature, and suggest high potential of such junctions for qubit applications. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | American Physical Society | |||||
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.76.134501 | |||||
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 13, p. 134501-134501, 発行日 2007-10 |
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フォーマット | ||||||
application/pdf | ||||||
著者版フラグ | ||||||
値 | publisher | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/11286 | |||||
識別子タイプ | HDL |