| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9781605 | Journal of Physics and Chemistry of Solids | 2005 | 4 Pages |
Abstract
We report investigations of the smearing origin about a zero-bias conductance peak (ZBCP) observed in high-Tc superconductor (HTSC) tunnel junctions from the point of view of the circuit theory analysis for d-wave superconductors. The ZBCP enhancement was measured in Bi2Sr2CaCu2O8+δ-SiO-Ag planar tunnel junctions only for ab-plane directions. On the other hand, the circuit theory has been recently generalized from conventional superconductors to unconventional superconductors. The analysis in terms of the circuit theory reveals that the tunneling spectral behaviors of the ZBCP were well explained even when the Dynes's broadening factor was excluded from a tunneling spectral formula. Thus, the smearing effect in the ZBCP is understood by the influence of a diffusive normal metal resistance in the systems of HTSC tunnel junctions.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Iduru Shigeta, Yukio Tanaka, Fusao Ichikawa, Yasuhiro Asano, Satoshi Kashiwaya,