Two-dimensional (2D) transition-metal dichalcogenide superconductors have unique and desirable properties for integration with conventional superconducting circuits. However, fully superconducting contact must be made between the 2D material and three-dimensional (3D) superconductors in order to employ the standard microwave drive and readout of qubits in such circuits. Here, we present a method for creating zero-resistance contacts between 2D NbSe2 and 3D aluminum that behave as Josephson junctions (JJs) with large effective areas compared to 3D-3D JJs. We present a model for the supercurrent flow in a 2D-3D superconducting structure by numerical solution of the Ginzburg-Landau equations and find good agreement with experiment. These results demonstrate a crucial step towards a new generation of hybrid superconducting quantum circuits.
@article{arxiv.1911.09711,
title = {Superconducting Contact and Quantum Interference Between Two-Dimensional van der Waals and Three-Dimensional Conventional Superconductors},
author = {Michael R. Sinko and Sergio C. de la Barrera and Olivia Lanes and Kenji Watanabe and Takashi Taniguchi and Susheng Tan and David Pekker and Michael Hatridge and Benjamin M. Hunt},
journal= {arXiv preprint arXiv:1911.09711},
year = {2021}
}