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The development of superconductor/insulator/superconductor(SIS)tunnel junctions inthe cuprate high-temperature superconductor family has been hampered by an anisotropicstructure and a coherence length ξ as short as 0.3 nm. However, the discovery of Ba_(1-x)K_x-BiO_3(x≈0.4) superconductor which is an isotropic cubic structure and has a moderately
The development of superconductor / insulator / superconductor (SIS) tunnel junctions inthe cuprate high-temperature superconductor family has been hampered by an anisotropy structure and a coherence length ξ as short as 0.3 nm. However, the discovery of Ba_ (1-x) K_x- BiO_3 (x≈0.4) superconductor which is an isotropic cubic structure and has a moderately