Volume 60, Number 2, October 2002
|Page(s)||281 - 287|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 October 2002|
The penetration depth in : Evidence for orbital-dependent superconductivity
Institut für Theoretische Physik, ETH-Hönggerberg CH-8093 Zürich, Switzerland
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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