In some copper oxides, superconductivity emerges when fixed electrons become mobile. A microscopy technique reveals that this process is associated with the transfer of electrons between real and abstract spaces.
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Hanaguri, T. Dual realities in superconductors. Nature 454, 1062–1063 (2008). https://doi.org/10.1038/4541062a
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DOI: https://doi.org/10.1038/4541062a
