– The apparent T -temperature dependence of the London penetration depth in Sr2RuO4 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 lnT in the London limit and as T 2 in the Pippard limit. These behaviors appear only at very low temperature. On t...

Abstract This paper presents the effects of Lorentz violation in superconductivity. Constructing a Lorentz-violating Ginzburg-Landau theory superconductivity we discuss influence tensors and $\hat{k}_a^i$ London's penetration depth, coherence length critical magnetic field.

Application of a tunnel-diode resonator (TDR) technique for studies of the vortex response in magnetic superconductors is described. Operating at very small ex-citation fields and sufficiently high frequency, TDR was used to probe small-amplitude linear AC response in several types of single crystals where long-range magnetic order coexists with bulk superconductivity. Full local-moment ferroma...

– Until recently it has been believed that the superconductivity in Sr2RuO4 is described by p-wave pairing. However, both the recent specific heat and the magnetic penetration depth measurements on the purest single crystals of Sr2RuO4 appear to be explained more consistently in terms of f-wave superconductivity. In order to further this hypothesis, we study theoretically the thermodynamics and...

It is pointed out that the Ferrell-Glover-Tinkham sum rule relating the "missing area" in the low frequency conductivity to the penetration depth can be violated in certain superconductors.. Its breakdown indicates that the effective mass of the carriers changes in entering the superconducting state, and implies a change in the conductivity at frequencies much higher than the superconducting ga...