Conventional s-wave superconductivity and hidden peak effect in single
crystals of Mo$_8$Ga$_41$ superconductor
Conventional s-wave superconductivity and hidden peak effect in single
crystals of Mo$_8$Ga$_41$ superconductor
London and Campbell penetration depths were measured in single crystals of the endohedral gallide cluster superconductor, Mo$_{8}$Ga$_{41}$. The full temperature range superfluid density is consistent with the clean isotropic $s-$wave weak-coupling BCS theory without any signs of the second gap or strong coupling. The temperature dependence of the Campbell length …