Granular superconductors for high kinetic inductance and low loss quantum devices
arXiv:2008.02860 · doi:10.1063/5.0017749
Abstract
Granular aluminum is a promising material for high kinetic inductance devices such as qubit circuits. It has the advantage over atomically disordered materials such as NbN_x, to maintain a high kinetic inductance concomitantly with a high quality factor. We show that high quality nano-scale granular aluminum films having a sharp superconducting transition with normal state resistivity values of the order of 1x10^5 μΩcm and kinetic inductance values of the order of 10 nH/sq can be obtained, surpassing state of the art values. We argue that this is a result of the different nature of the metal-to-insulator transition, being electronic correlations driven (Mott type) in the former and disorder driven (Anderson type) in the latter.
The following article has been accepted by Applied Physics Letters. After it is published, it will be found at http://apl.aip.org/
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Cited by in corpus (12)
- Tuning the Josephson diode response with an ac current
- Tuning the superconducting dome in granular aluminum thin films
- Quantum bath engineering of a high impedance microwave mode through quasiparticle tunneling
- Low-Loss Superconducting Resonators Fabricated from Tantalum Films Grown at Room Temperature
- Efficient Microwave Photon to Electron Conversion in a High Impedance Quantum Circuit
- Strong Charge-Photon Coupling in Planar Germanium Enabled by Granular Aluminium Superinductors
- Demonstration of dual Shapiro steps in small Josephson junctions
- Quantum Coherence in Superconducting Vortex States
- Study of Magnetic Field Resilient High Impedance High-Kinetic Inductance Superconducting Resonators
- Recombination of localized quasiparticles in disordered superconductors
- Influence of growth parameters on the superconducting transition temperature in granular aluminum films
- Encapsulation epitaxy of air-stable monolayer superconducting films for quantum circuits and qubits