Unidirectional superconductivity without a magnetic fields is possible, according to the technical university of Delft. The proof-of-concept uses a van der Waals heterostructure with 2D materials: NbSe2 – Nb3Br8 – NbSe2, and is superconducting on one direction, and normally-conducting in the other. Compared with the semiconductor diode, “superconductors never had an equivalent of this one-way idea ...

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