The penetration depth in Sr2RuO4: Evidence for orbital dependent superconductivity

Abstract

The apparent $T^2$-temperature dependence of the London penetration depth in Sr${}_2$RuO${}_4$ 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 $-T^2\ln T$ in the London limit and as $T^2$ 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 $T^2$-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.

7 pages, 3 figures in EPL style

References in corpus (1)

• Anisotropy of magnetothermal conductivity in Sr2RuO4

Cited by in corpus (9)

• Spin resonance in the d-wave superconductor CeCoIn5
• Non-Locality and Strong Coupling in the Heavy Fermion Superconductor CeCoIn${}_5$: A Penetration Depth Study
• Theory of Transport Properties in the p-wave Superconducting State of Sr2RuO4 - A Microscopic Determination of the Gap Structure -
• In-plane magnetic penetration depth in Sr${}_2$RuO${}_4$: muon-spin rotation/relaxation study
• Low temperature electronic properties of Sr_2RuO_4 II: Superconductivity
• Influence of gap structures to specific heat in oriented magnetic fields: Application to the orbital dependent superconductor, Sr${}_2$RuO${}_4$
• Raman Spectra of Triplet Superconductor in Sr${}_2$RuO${}_4$
• Excess current in superconducting Sr${}_2$RuO${}_4$
• Optical conductivity of superconducting Sr_2RuO_4