Contact: Breehan Gerleman Lucchesi
Caption: A polarized light microscopy image of structural domains in a barium-iron-arsenide crystal, a type of superconductor. Physicists at the US Department of Energy's Ames Laboratory discovered unexpected resistivity changes in crystals doped with potassium, which suggest a close relationship between magnetism and superconductivity in iron-based superconductors.
Credit: U.S. Dept. of Energy's Ames Laboratory
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