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Superconductivity

The imaginary is real

Experiments on nano-islands of a high-temperature superconductor reveal the presence of a small imaginary component of the superconducting order parameter.

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Figure 1: A pure d x 2 - y 2 order parameter has nodes where its amplitude goes down strictly to zero and its phase changes by π.

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Correspondence to Guy Deutscher.

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Deutscher, G. The imaginary is real. Nature Nanotech 8, 10–11 (2013). https://doi.org/10.1038/nnano.2012.245

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