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.

*This material is based upon work supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Superconducting Quantum Materials and Systems Center (SQMS) under contract number DE-AC02-07CH11359.

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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