Electrical Properties of Boundary between YBa_2Cu_3O_<7-δ> and Ba_<1-x>K_xBiO_3 Thin Films
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概要
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We have fabricated a contact between an epitaxially grown YBa_2Cu_3O_<7-δ> thin film and a polycrystalline Ba_<1-x>K_xBiO_3 thin film. This contact exhibits the typical I-V characteristics of quasi-particle tunneling which are observed for junctions consisting of electrodes having different superconducting energy gaps. From the I-V characteristics, the superconducting energy gap, 2Δ, is estimated to be 1.5 meV along the c-axis for YBa_2Cu_3O_7 and 3 meV for Ba_<1-x>K_xBiO_3 The 2Δ/kT_c for the Ba_<1-x>K_xBiO_3 is about 3.5, which is equal to that derived from a boundary Josephson junction. These properties show that the contact boundary between YBa_2Cu_3O_<7-δ> and Ba_<1-x>K_xBiO_3 works as the tunneling barrier.
- 社団法人応用物理学会の論文
- 1990-08-20
著者
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Moriwaki Kazuyuki
Faculty Of Engineering Science Osaka University:(present Address) Electrical Communication Laborator
-
Enomoto Youichi
Ntt Applied Electronics Laboratories
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Moriwaki K
Ntt Applied Electronics Laboratories
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MORIWAKI Kazuyuki
NTT Applied Electronics Laboratories
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