Pairing resonance as a normal-state spin probe in ultra-thin Al films

Abstract

We present a quantitative analysis of the low-temperature, high parallel field pairing resonance in ultra-thin superconducting Al films with dimensionless conductance g>>1. In this regime we derive an analytical expression for the tunneling density-of-states spectrum from which a variety of normal-state spin parameters can be extracted. We show that by fitting tunneling data at several supercritical parallel magnetic fields we can determine all of the relevant parameters that have traditionally been obtained via fits to tunneling data in the superconducting phase. These include the spin-orbit scattering rate, the antisymmetric Landau parameter G^0, and the orbital pair-breaking parameter.

5 pages, 6 figures

References in corpus (8)

• Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state
• Spontaneous symmetry breakings in graphene subjected to in-plane magnetic field
• Tunneling Anomaly in Superconductor above Paramagnetic Limit
• Fermi-liquid effects in the gapless state of marginally thin superconducting films
• Theory of Tunneling Anomaly in Superconductor above Paramagnetic Limit
• Orbital Response of Evanescent Cooper Pairs in Paramagnetically Limited Al Films
• Measurement of Conduction Electron Polarization Via the Pairing Resonance
• Tunneling anomaly of superconducting films in strong magnetic fields

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• Asymmetric Avalanches in the Condensate of a Zeeman-limited Superconductor
• Quantum-fluctuation effects in transport properties of superconductors above the paramagnetic limit
• Spin-Polarized Tunneling in Critically Disordered Be-Al Bilayers