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  1. B200 工学部/工学研究科
  2. B200a 雑誌掲載論文
  3. 学術雑誌

Theory of macroscopic quantum tunneling in high-T_c c-axis Josephson junctions

http://hdl.handle.net/2237/11286
http://hdl.handle.net/2237/11286
5fce2801-5ab5-4aa2-a57b-5cc4f1c6d305
名前 / ファイル ライセンス アクション
PhysRevB_76_134501.pdf PhysRevB_76_134501.pdf (411.6 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 Theory of macroscopic quantum tunneling in high-T_c c-axis Josephson junctions
言語 en
著者 Yokoyama, Takehito

× Yokoyama, Takehito

WEKO 27070

en Yokoyama, Takehito

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Kawabata, Shiro

× Kawabata, Shiro

WEKO 27071

en Kawabata, Shiro

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Kato, Takeo

× Kato, Takeo

WEKO 27072

en Kato, Takeo

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Tanaka, Yukio

× Tanaka, Yukio

WEKO 27073

en 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
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
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