Nonlinear low-temperature conductivity of the junction Bi2Sr2CaCu2O<i>x</i>/Ag
Yu. N. XiangB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, 310164 KharkovО. Г. ШевченкоB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, 310164 KharkovYu. S. NalbatB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, 310164 Kharkov
ABI
Аннотация
Electrical properties of a contact formed by burning silver paste into the surface of a BiSrCaCuO crystal are studied. The contact displays tunneling properties of an NIS junction with an energy gap much smaller than in the bulk of a high-temperature superconductor. Such a low value of the gap parameter is attributed to the surface-layer superconductivity suppressed or induced in the HTS by the proximity effect.
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