Josephson Effect in Weak Links between URu2Si2 and Nb

Ryousuke Tachibana; Akihiko Sumiyama; Yasukage Oda; Etsuji Yamamoto; Yoshinori Haga; Tetsuo Honma; Yoshichika Onuki

doi:10.1143/jpsj.72.364

Josephson Effect in Weak Links between URu₂Si₂ and Nb

Ryousuke Tachibana, Akihiko Sumiyama, Yasukage Oda, Etsuji Yamamoto, Yoshinori Haga, Tetsuo Honma, Yoshichika Onuki

著者情報

キーワード: Josephson effect, URu₂Si₂, heavy-fermion superconductor, SNS′ junction

ジャーナル認証あり

2003 年 72 巻 2 号 p. 364-368

DOI https://doi.org/10.1143/jpsj.72.364

詳細

抄録

Josephson critical current density J_c between a single crystal URu₂Si₂ and an s-wave superconductor has been investigated for URu₂Si₂–Cu–Nb(SNS′) and URu₂Si₂–Nb(SS′) junctions. In contrast to the previous result for point-contacts, J_c is observed along the c-axis as well as the a-axis direction of URu₂Si₂. The J_c value in SS′ junctions is of the same order of magnitude independent of current direction or surface roughness of the (001) plane, suggesting that c-axis Josephson coupling is intrinsic.

責任著者(Corresponding author)

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