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PROOF COPY [BE11055] 030929PRB [BE11055]030929PRB

Summary: PROOF COPY [BE11055] 030929PRB
Pairing resonance as a normal-state spin probe in ultrathin Al films
G. Catelani
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
Y. M. Xiong, X. S. Wu,* and P. W. Adams
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
Received 5 May 2009
We present a quantitative analysis of the low-temperature, high parallel-field pairing resonance in ultrathin
superconducting Al films with dimensionless conductance g 1. In this regime we derive an analytical expres-
sion 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 G0
and the orbital pair-breaking parameter.
DOI: XXXX PACS number s : 74.50. r, 74.40. k, 74.78.Db, 73.50.Fq


Source: Adams, Philip W. - Department of Physics and Astronomy, Louisiana State University


Collections: Materials Science