Abstract
We report tunneling measurements of the superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8 using break junctions. The differential conductance dl/dV at T = 4.2 K shows no leakage around zero bias, while the gap edge peaks in dl/dV are somewhat broadened compared to the simple BCS density of states. This strongly suggests an s-wave superconductivity with an anisotropic gap. From the best data, we obtain a result that the gap anisotropy in Bi2Sr2CaCu2O8 is larger than that in YBa2Cu3O7.
| Original language | English |
|---|---|
| Pages (from-to) | 1899-1900 |
| Number of pages | 2 |
| Journal | Physica C: Superconductivity and its applications |
| Volume | 235-240 |
| Issue number | PART 3 |
| DOIs | |
| Publication status | Published - Dec 1994 |
| Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
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Ekino, T., Minami, T., Fujii, H., & Akimitsu, J. (1994). Superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8. Physica C: Superconductivity and its applications, 235-240(PART 3), 1899-1900. https://doi.org/10.1016/0921-4534(94)92171-7