B What Makes Samarium Hexaboride a Paradoxical Material?

Robert Sanchez
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This is from 2015. There has been quite a few more work being done in this area of topological insulator since then.

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From the BCS theory of superconductivity is well known that the superfluid density smoothly decreases with increasing temperature. Annihilated superfluid carriers become normal and lose their momenta on lattice atoms. So if we induce a persistent supercurrent in a ring below Tc and after that slowly increase the temperature, we must observe a decrease in the actual supercurrent, because the density of electron pairs and total supercurrent momentum decrease. However, this supercurrent...

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