Tunneling Spectroscopy of Y-Ba-Cu-O Compound
Ienari IguchiInstitute of Materials Science, University of TsukubaHirohito WatanabeInstitute of Materials Science, University of TsukubaYuji KasaiInstitute of Materials Science, University of TsukubaT. MochikuInstitute of Materials Science, University of TsukubaAkimitsu SugishitaInstitute of Materials Science, University of TsukubaEiso YamakaInstitute of Materials Science, University of Tsukuba
1987en
ABI
Abstract
Single particle tunneling between a sintered Y-Ba-Cu-O compound and a Pb film is presented. The differential tunnel characteristic as a function of junction voltage exhibits a series of gap structure at Δ, 2Δ and 3Δ. The observed value of 2Δ/ k B T c is 10.5, much greater than the BCS value of 3.52. Temperature dependence of the gap is in good agreement with the BCS theory.
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