Microwave properties of superconductors close to SIT

Abstract

Strongly disordered pseudogapped superconductors are expected to display arbitrary high values of kinetic inductance close to superconductor-insulator transition (SIT) that makes them attractive for the implementation of dissipationless superinductance. We develop the theory of the collective modes in these superconductors and discuss associated dissipation at microwave frequencies. We obtain the collective mode spectra dependence on the disorder level and conclude that collective modes become relevant source of dissipation and noise in the far vicinity of SIT.

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Cited by in corpus (16)

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• Infrared activation of the Higgs mode by supercurrent injection in superconducting NbN
• Granular Aluminum Meandered Superinductors for Quantum Circuits
• Microscopic charging and in-gap states in superconducting granular aluminum
• Tuning Superinductors by Quantum Coherence Effects for Enhancing Quantum Computing
• Hopping conductance and macroscopic quantum tunneling effect in three dimensional Pb${}_x$(SiO${}_2$)${}_{1-x}$ nanogranular films
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• Near-power-law temperature dependence of the superfluid stiffness in strongly disordered superconductors
• The effects of disorder in superconducting materials on qubit coherence
• Microscopic charged fluctuators as a limit to the coherence of disordered superconductor devices
• Random telegraph fluctuations in granular microwave resonators
• Distribution of the order parameter in strongly disordered superconductors: An analytic theory
• Universal Hall coefficient correction in strongly coupled Cr-SiO${}_2$ nanogranular metals
• Localized quasiparticles in a fluxonium with quasi-two-dimensional amorphous kinetic inductors