Point Contact Studies of High Tc Superconductors |
| B. Susła Institute of Physics, Poznań Technical University, Piotrowo 3, 60-965 Poznań, Poland S.C. Meepagala and E.L. Wolf Department of Physics, Polytechnic University, Brooklyn, New York 11201, USA |
| Received: December 14, 1992; in final form: May 24, 1993 |
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| Point contact spectroscopy experiments were performed on both single crystals Bi2Sr2CaCu2O8+y and BiSrCaCuO/Ag sintered material using gold tips. The spectra exhibit tunneling structure, which are interpreted in terms of the energy gap structure 2Δ = 58 meV at 4.2 K. We observed the strong Andreev reflection of the Au-BiSrCaCuO/Ag boundary. |
| DOI: 10.12693/APhysPolA.84.315 PACS numbers: 74.50.+r, 74.70.Tx |