Fig. 1: Characterization of the NiTe₂-based JJ.

a Temperature dependence of resistance R of an exfoliated NiTe₂ nanoplate. The left inset is a schematic illustration of the atomic structure of NiTe₂ crystal. The right inset is magnetic field dependence of R at 1.55 K. The black dashed line represents a linear fit to the data. b False-color scanning electron microscopic image of a typical NiTe₂-based Josephson junction D1, where the purple color represents superconducting NbTiN electrodes with a width t ~ 500 nm. The separation L between electrodes is ~300 nm. The width W of the NiTe₂ nanoplate (red color) between the two electrodes is ~1.5 μm. c The I–V characteristic curve showing the Josephson supercurrent at 70 mK.