We report on the fabrication of Josephson junction devices with weak links utilizing the Weyl and higher-order topological semimetal $\text{ WTe}_2$. We show that $\text{ WTe}_2\text{ /Pd}$ contact annealed at a low temperature of 80{ \deg}C did not exhibit superconducting properties because neither $\text{ WTe}_2$ nor Pd are superconductors in the ground state. Upon 180{ \deg}C annealing, spontaneous formation of superconducting $\text{ PdTe}$ due to Pd diffusion enabled us to obtain the interface between $\text{ WTe}_2$ and superconductor suitable for the Josephson junction. This result is a facile technique to make a Josephson junction and induce Cooper pairs into topological telluride semimetals.
Categories: cond-mat.supr-con cond-mat.mes-hall