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Abstract: The origin of the exceptionally strong superconductivity of cuprates remainsa subject of debate after more than two decades of investigation. Here wefollow a new lead: The onset temperature for superconductivity scales with thestrength of the anomalous normal-state scattering that makes the resistivitylinear in temperature. The same correlation between linear resistivity and Tcis found in organic superconductors, for which pairing is known to come fromfluctuations of a nearby antiferromagnetic phase, and in pnictidesuperconductors, for which an antiferromagnetic scenario is also likely. In thecuprates, the question is whether the pseudogap phase plays the correspondingrole, with its fluctuations responsible for pairing and scattering. We reviewrecent studies that shed light on this phase - its boundary, its quantumcritical point, and its broken symmetries. The emerging picture is that of aphase with spin-density-wave order and fluctuations, in broad analogy withorganic, pnictide, and heavy-fermion superconductors.



Author: Louis Taillefer

Source: https://arxiv.org/







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