Magnetic penetration depth of Aluminum thin films

Abstract

We present a study of the superconducting penetration depth $\lambda$ in aluminum thin films of varying thickness. The range of thicknesses chosen spans from the thin-film regime to the regime approaching bulk behavior. The penetration depths observed range from $\lambda =163.3\pm 0.4\mathrm{nm}$ for the thinnest $20\mathrm{nm}$ samples down to $\lambda =53.6\pm 0.4\mathrm{nm}$ for the $200\mathrm{nm}$-thick ones. In order to accurately determine $\lambda$, we performed complementary measurements using the frequency of superconducting $LC$ resonators as well as the resistance of normal-state meanders. Both methods yield comparable results, providing a well-characterized set of values of $\lambda$ in aluminum in the relevant range for applications in fields such as quantum computing and microwave radiation detector technologies.

References in corpus (8)

• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Observation of the Bloch-Siegert Shift in a Qubit-Oscillator System in the Ultrastrong Coupling Regime
• Efficient and robust analysis of complex scattering data under noise in microwave resonators
• Microwave Dielectric Loss at Single Photon Energies and milliKelvin Temperatures
• Measurement and Control of Quasiparticle Dynamics in a Superconducting Qubit
• Trapping a single vortex and reducing quasiparticles in a superconducting resonator
• One qubit as a Universal Approximant
• Engineering superconducting qubits to reduce quasiparticles and charge noise

Cited by in corpus (6)

• Turning non-superconducting elements into superconductors by quantum confinement and proximity
• Ginzburg-Landau Theory for Confined Thin-Film Superconductors
• Gate-tunable Josephson diodes in magic-angle twisted bilayer graphene
• Simultaneous sweet-spot locking of gradiometric fluxonium qubits
• Reflections on future problems in cluster science
• Review of Superconducting Qubit Devices and Their Large-Scale Integration