Superconducting Resonators Based on TiN/Tapering/NbN/Tapering/TiN Heterostructures
Source abstract
Abstract
We fabricated a type of superconducting heterostructures, TiN/tapering/NbN/tapering/TiN, on c‐cut sapphire substrates by reactive magnetron sputtering. The goal is to achieve an x‐band resonator that maintains a high Q in modest magnetic fields. The structure shows (111) orientation with local epitaxial correlation, as a result of stacking face‐centered‐cubic structures on top of hexagonal‐close‐packing substrates. The artificial tapering layers vary gradually from NbN into TiN and vice versa, creating a smooth transition so that no distinct interface exists. We characterized microstrip single line resonators on these heterostructures that are promising candidates for quantum information processing with hybrid nuclear‐electron spins.
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Research context
OpenAlex topics: Quantum and electron transport phenomena · Physics of Superconductivity and Magnetism · Superconducting and THz Device Technology
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Electrical and Computer Engineering University of Waterloo Waterloo ON, Canada N2L 3G1
Institute for Quantum Computing University of Waterloo Waterloo ON, Canada N2L 3G1
Department of Chemistry University of Waterloo Waterloo ON, Canada N2L 3G1
Perimeter Institute for Theoretical Physics Waterloo ON, Canada N2L 2Y5
Canada Institute for Advanced Research Toronto ON, Canada M5G 1Z8
Beijing National Laboratory for Condensed Matter Physics Institute of Physics, Chinese Academy of Sciences Beijing, China 100190
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