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Impact of surface growth method and surface treatment in niobium-based superconducting devices

ORAL

Abstract

We explore the comparison between two growth methods for niobium film - sputtering and electron-cyclotron resonance growth - for niobium-based superconducting resonators. We discuss some of the key properties of the films, including surface characterization and residual resistance measurements metrics.

We present our design of various devices used in this study including superconducting resonators and qubits, both in planar configurations and integrated in 3D cavities, as well as experimental characterization of coherence metrics.

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Presenters

  • Adrian Lupascu

    University of Waterloo

Authors

  • Adrian Lupascu

    University of Waterloo

  • Francesco Crisa

    Fermi National Accelerator Laboratory, Fermilab, Fermilab, SQMS, Fermi National Accelerator Laboratory (Fermilab)

  • Sabrina Garattoni

    Fermilab, Fermi National Accelerator Laboratory (Fermilab), Fermi National Accelerator Laboratory

  • Shaojiang Zhu

    Fermi National Accelerator Laboratory (Fermilab), Fermilab, Fermi National Accelerator Laboratory

  • Akshay Murthy

    Fermi National Accelerator Laboratory, Fermi National Accelerator Laboratory (Fermilab), Fermilab

  • Alexander Romanenko

    Fermi National Accelerator Laboratory, Fermi National Accelerator Laboratory (Fermilab), Fermilab

  • Anna Grassellino

    Fermi National Accelerator Laboratory, Fermi National Accelerator Laboratory (Fermilab), Fermilab

  • Mustafa Bal

    Fermi National Accelerator Laboratory, Fermi National Accelerator Laboratory (Fermilab), Fermilab

  • Anne-Marie Valente-Feliciano

    Thomas Jefferson National Accelerator Facility, Jefferson Lab/Jefferson Science Associates

  • Chi Zhang

    University of Waterloo

  • Noah Janzen

    University of Waterloo