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Measurement of the Josephson effect of heavy-fermion superconductor UPt$$_3$$ as a test of the odd-parity order parameter

重い電子系超伝導体UPt$$_3$$のジョセフソン効果測定及び奇パリティ秩序変数の検証

郷地 順*; 住山 昭彦*; 本山 岳*; 山口 明*; 木村 憲彰*; 山本 悦嗣 ; 芳賀 芳範 ; 大貫 惇睦

Gochi, Jun*; Sumiyama, Akihiko*; Motoyama, Gaku*; Yamaguchi, Akira*; Kimura, Noriaki*; Yamamoto, Etsuji; Haga, Yoshinori; Onuki, Yoshichika

The Josephson critical current I$$_c$$ between a single-crystal UPt$$_3$$ and Al has been measured for the junctions on the UPt$$_3$$ surface perpendicular to the hexagonal axes. The obtained results contradict the $$E_{2u}$$ scenario for the odd-parity order parameter in UPt$$_3$$, in which the Josephson effect is forbidden in the three directions, whereas the recently proposed $$E_{1u}$$ scenario permits, at least, the $$a$$- and $$c$$-axis Josephson couplings.

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パーセンタイル:45.69

分野:Physics, Multidisciplinary

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