[Zurück]

S.V. Taylor, J.F. Landaeta, D. Subero, P. Machado, E. Bauer, I. Bonalde:
"Evidence of s-wave superconductivity in ternary intermetallic La3Pd4Si4";
Superconductor Science and Technology, 28 (2015), S. 1 - 4.

We measured the temperature dependence of the magnetic penetration depth of La3Pd4Si4 down to $0.02\;{T}_{{\rm{c}}}$. We observe a temperature-independent behaviour below $0.25\;{T}_{{\rm{c}}}$, which is firm evidence for a nodeless superconducting gap in this material. The data display a very small anomaly around 1 K which we attribute to the possible presence of a superconducting impurity phase. The superfluid density is well described by a two-phase model, considering La3Pd4Si4 and the impurity phase. The present analysis suggests that the superconducting energy gap of La3Pd4Si4 is isotropic, as expected for conventional BCS superconductors.

http://dx.doi.org/10.1088/0953-2048/28/9/095013