A superconducting device that exhibits voltage steps twice as large as expected could harbour Majorana fermions.
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Williams, J., Goldhaber-Gordon, D. Doubling down on Majorana. Nature Phys 8, 778–779 (2012). https://doi.org/10.1038/nphys2459
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DOI: https://doi.org/10.1038/nphys2459
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