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The Pseudogap, That Strange Metallic State, Finally Has an Experimental Portrait - 1ban.news
High-temperature superconductors have a shadow state that has haunted condensed matter physics for decades. Cool a cuprate material and, before it becomes superconducting, it passes through a strange phase where the material behaves like a metal but with something missing: a gap in its low-energy excitations that should not be there. This pseudogap phase has