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

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

2009-05-14

arxiv.org/abs/0905.2414v2

Phys. Rev. B 80, 054512 (2009)

Physics

Condensed Matter

Superconductivity

5 pages, 6 figures

Scientific paper

10.1103/PhysRevB.80.054512

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.

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