Electric properties of the Y-Ba-Cu-O/Ag interface

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作者
Mizushima, Koichi [1 ]
Sagoi, Masayuki [1 ]
Miura, Tadao [1 ]
Yoshida, Jiro [1 ]
机构
[1] Toshiba Research & Development, Cent, Japan
关键词
Ceramic Materials - Silver and Alloys - Yttrium Compounds - Electric Conductivity;
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摘要
The energy gap parameter 2 induced in Ag, evaporated on an Y-Ba-Cu-O (YBCO) film, was determined by a quasi-particle tunneling experiment for a YBCO/Ag/PbOx/Pb junction. The energy gap 2 was as large as 35 mV at 4 K and decreased almost linearly with an increase in temperature, vanishing at about 45 K. The same type of junction with a larger tunnel conductance showed a tunnel-type Josephson characteristic below the critical temperature of Pb.
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