Penetration depth study of LaOs${}_4$Sb${}_{12}$: Multiband s-wave superconductivity

X. Y. Tee, H. G. Luo, T. Xiang +6

We measured the magnetic penetration depth $\lambda (T)$ in single crystals of LaOs${}_4$Sb${}_{12}$ ($T_c$=0.74 K) down to 85 mK using a tunnel diode oscillator technique. The observed low…