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▲ [16p-B414-10] Gate Defined Josephson junctions in monolayer WTe2
Keywords:Josephson junction, 2D material
Josephson junctions have been fabricated in the monolayer WTe2. Contacts to the WTe2 layer are formed with the in-situ etching and sputtering of Pd/NbTi. Superconductivity is induced in the WTe2 layer by applying positive gate voltages on the left and right side gates, and is controlled by the center gate. Formation of the Josephson junction is confirmed by the quantized steps in the current-voltage characteristics (Schapiro steps) under the microwave irradiation and magnetic field response of the supercurrent. It is found that the current channel is not uniform in the junction and the screening is lacking in the superconducting leads in the WTe2 region.