Conventional BCS superconductors are expected to exhibit a conductivity with vanishing dissipation with decreasing temperature. While bulk physical properties measurements indicate PdPb2 is a conventional superconductor with a Tc of 3.0 K, measurements of surface impedance through the microwave cavity perturbation technique indicate a large, non-vanishing dissipative component below Tc that is at odds with conventional superconductivity. We demonstrate PdPb2 to be a possible topological superconductor with a fully gapped bulk and a dissipative Majorana fluid surface.
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