| Issue |
Europhys. Lett.
Volume 60, Number 2, October 2002
|
|
|---|---|---|
| Page(s) | 281 - 287 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00348-5 | |
| Published online | 01 October 2002 | |
The penetration depth in 
:
Evidence for orbital-dependent superconductivity
Institut für Theoretische Physik, ETH-Hönggerberg CH-8093 Zürich, Switzerland
Received:
3
May
2002
Accepted:
6
August
2002
The apparent T2-temperature dependence of the London
penetration depth in is discussed on the basis of
a multi-gap model with horizontal line nodes. The influence of
the nodes in combination with nonlocal electromagnetic response
leads to low-temperature behaviors as 
in the London
limit and as T2 in the Pippard limit. These behaviors appear
only at very low temperature. On the other hand, the interplay of
the superconductivity of different bands is responsible for the
observed T2-like behavior over the wide temperature range. The
experimental data can be fitted well with a set of material
parameters as was used in the specific-heat fitting.
PACS: 74.20.Rp – Pairing symmetries (other than s-wave) / 74.25.Bt – Thermodynamic properties / 74.70.Pq – Ruthenates
© EDP Sciences, 2002
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