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Ferroelectrics Volume 128, 1992 - Issue 1
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Original Articles

Tunneling studies of high-Tc oxide superconductors

B. Susla Institute of Physics, Poznan Technical University, 60–965, Poznan, Poland; Department of Physics, Polytechnic University, Brooklyn, N. Y., 11201, USA
,
H. J. Tao Department of Physics, Polytechnic University, Brooklyn, N. Y., 11201, USA
&
E. L. Wolf Department of Physics, Polytechnic University, Brooklyn, N. Y., 11201, USA
Pages 225-230 | Published online: 10 Feb 2011
 
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Abstract

Tunneling spectroscopy measurements have been performed on single crystals Bi—Sr—Ca—Cu—O, using the natural surface oxides as the tunnel barrier. The energy gap 2Δ was 58meV at 4·2K and crystals give a sharp single transition at Tc = 90K. Large values of 2Δ/kBTc in 2212 phase are obtained.

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