Normal-superconducting tunneling in bulk high Tc superconductors: Charging effects and effect of energy gap asymmetries

✍ Scribed by R. Medina; J. Aponte; M. Octavio

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 312 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(09)80383-9

✦ Synopsis

We present experimental data for normal-superconducting (N-S) contacts using both La-Sr-Cu-O and Y-Sa-Cu-O as superconductor. We find that the I-V characteristics can be explained with a simple model incorporating charging effects,which can explain the increasing differential resistance at voltages well above the gap voltage and the variation on the observed gap voltages on nominally equal samples. We also note the relationship between asymmetries in the I-V characteristics and the energy dependence of the gap.