Muon and neutron experiments on the new FeAs-based superconductors reveal phase diagrams and spin excitation modes with striking similarities to a wide range of other unconventional superconductors.
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Uemura, Y. Commonalities in phase and mode. Nature Mater 8, 253–255 (2009). https://doi.org/10.1038/nmat2415
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DOI: https://doi.org/10.1038/nmat2415
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