The effect of superconducting fluctuations on the resistance of tunneling junction: The existence of ultrathin surface layer in NbN films |
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| Authors: | AA Varlamov VV Dorin EM Rudenko VE Shaternik |
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| Institution: | Moscow Steel and Alloys Institute, Leninski Prospect, 4, Moscow, U.S.S.R.;Metal Physics Institute of the Ukranian SSR Academy of Sciences, Kiev, U.S.S.R. |
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| Abstract: | The effect of superconducting fluctuations on quasi-particle current of tunneling junction is discussed. The anomalous contribution in tunneling current from interacting across the barrier fluctuations is found. It gives rise to pseudogap minimum in Rd(V). Similar dependence is observed experimentally in NbN-I-Pb junctions. Reasons are given to suggest that there is some ultrathin layer on the surface of NbN films whose properties drastically differ from the bulk one. |
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