| Issue |
Europhys. Lett.
Volume 49, Number 1, January I 2000
|
|
|---|---|---|
| Page(s) | 86 - 91 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2000-00123-2 | |
| Published online | 01 September 2002 | |
The pseudogap in 
single crystals from tunneling
measurements: A possible evidence for the Cooper pairs above 
Université Libre de Bruxelles, Service de Physique des Solides CP233,
Blvd. du Triomphe, B-1050 Brussels, Belgium
Received:
29
March
1999
Accepted:
21
October
1999
We present electron-tunneling spectroscopy of slightly overdoped 
(Bi2212) single crystals with 
–90 K in a
temperature range between 14 K and 290 K using a break-junction technique. The pseudogap
which has been detected above appears at 
. The analysis
of the spectra shows that there is a contribution to the pseudogap above
, which disappears approximately at 110–115 K. We associate this contribution
with the presence of incoherent Cooper pairs.
PACS: 74.50.+r – Proximity effects, weak links, tunneling phenomena, and Josephson effects / 74.25.-q – General properties; correlations between physical properties in normal and superconducting states / 74.72.Hs – Bi-based cuprates
© EDP Sciences, 2000
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