Superconducting Contact and Quantum Interference Between Two-Dimensional van der Waals and Three-Dimensional Conventional Superconductors

Michael R. Sinko; Sergio C. de la Barrera; Olivia Lanes; Kenji Watanabe; Takashi Taniguchi; Susheng Tan; David Pekker; Michael Hatridge; Benjamin M. Hunt

doi:10.1103/physrevmaterials.5.014001

arXiv · 1911.09711

Superconducting Contact and Quantum Interference Between Two-Dimensional van der Waals and Three-Dimensional Conventional Superconductors

Michael R. Sinko·Sergio C. de la Barrera·Olivia Lanes·Kenji Watanabe·Takashi Taniguchi·Susheng Tan·David Pekker·Michael Hatridge·Benjamin M. Hunt

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Abstract

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 NbSe$_2$ 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.

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Michael R. Sinko, Sergio C. de la Barrera, Olivia Lanes, Kenji Watanabe, Takashi Taniguchi, Susheng Tan, David Pekker, Michael Hatridge, Benjamin M. Hunt. 2019-11-21. Superconducting Contact and Quantum Interference Between Two-Dimensional van der Waals and Three-Dimensional Conventional Superconductors. https://doi.org/10.1103/physrevmaterials.5.014001

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