LETTER TO THE EDITOR: Observation of the Josephson effect in the heavy-fermion superconductor CeIrIn5 above Tc
LETTER TO THE EDITOR: Observation of the Josephson effect in the heavy-fermion superconductor CeIrIn5 above Tc
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致编辑的信：在 Tc 以上的重费米子超导体 CeIrIn5 中观察约瑟夫森效应
DOI：
10.1088/0953-8984/13/42/102
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Y. Ōnuki
中科院分区：
文献类型：
--
作者：
A. Sumiyama;D. Katayama;Y. Oda;Y. Inada;D. Aoki;Y. Tokiwa;Y. Haga;Y. Ōnuki
本文研究了重费米子超导体CeIrIn_5的约瑟夫森效应。CeIrIn_5具有两个特征温度T_0和Tc，T_0和Tc分别为CeIrIn_5-Cu-Nb结的零电阻态转变温度和体相热力学转变温度。对于在CeIrIn 5的（110）和（001）面上制造的所有结，观察到约瑟夫森效应的温度低于T0 = 0.8K，远高于Tc = 0.3K。该结果表明，至少CeIrIn 5的表面在低于T0时处于超导状态，其中CeIrIn 5和Nb之间的相位相干是可能的。
The Josephson effect for a heavy-fermion superconductor CeIrIn5, which has two characteristic temperatures T0 and Tc, has been investigated for CeIrIn5-Cu-Nb junctions, where T0 and Tc are the temperature of the transition to the zero-resistivity state and the bulk, thermodynamic transition temperature, respectively. For all the junctions fabricated on the (110) and (001) planes of CeIrIn5, the temperature below which the Josephson effect is observed is near T0 = 0.8 K and much higher than Tc = 0.3 K. This result suggests that at least the surface of CeIrIn5 is in a superconducting state below T0, in which phase coherence between CeIrIn5 and Nb is possible.