| Autor: |
Jian Ma, C. Quitmann, R.J. Kelley, P. Alméras, H. Berger, G. Margaritondo, M. Onellion |
| Rok vydání: |
1994 |
| Předmět: |
|
| Zdroj: |
Physica C: Superconductivity. :1875-1876 |
| ISSN: |
0921-4534 |
| DOI: |
10.1016/0921-4534(94)92159-8 |
| Popis: |
We present the first detailed data of the momentum-resolved, temperature dependence of the superconducting gap of $Bi_{2}Sr_{2}Ca_{1}Cu_{2}O_{8+x}$, complemented by similar data on the intensity of the photoemission superconducting condensate spectral area. The gap anisotropy between the $\Gamma-\bar{M}$ and $\Gamma-X$ directions increases markedly with increasing temperature, contrary to what happens for conventional anisotropic-gap superconductors such as lead. Specifically, the size of the superconducting gap along the $\Gamma-X$ direction decreases to values indistinguishable from zero at temperatures for which the gap retains virtually full value along the $\Gamma-\bar{M}$ direction. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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