How thin can superconducting materials be and still retain their superconductivity? A recent study of thin films grown on silicon substrates reveals that one atomic layer is the limit.
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Hasegawa, Y. The thinnest superconductor. Nature Phys 6, 80–81 (2010). https://doi.org/10.1038/nphys1527
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DOI: https://doi.org/10.1038/nphys1527