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Topology has come to reshape modern condensed matter physics. Still, most attention has only been focused on materials with weak electron-electron interactions, despite huge possibilities for emerging new phases when combining topology with strong electron interactions. Real-world materials bring disorder as a third important component, but the simultaneous interplay of strong electron interactions, topology, and disorder is yet unexplored territory. In this talk, I will show that topology combined with strong electron interactions in the copper oxide high-temperature superconductors gives rise to a new phase of matter that is unexpectedly robust to disorder. Our findings both explain a long-standing experimental controversy in these superconductors and show how the combination of strong electron interactions, topology, and disorder generates rich phenomena that defy conventional expectations.
Ref: arXiv:2103.12756
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