2008/09/17 by Gianluigi Catelani, G. Catelani, Xiaosong Wu +2
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.78.104515
published as Phys. Rev. B 78, 104515 (2008) · 6 pages, 4 figures
openalex publication_date 2008/09/17 · arxiv created 2008/09/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We present low-temperature tunneling density-of-states measurements in Al films in high parallel magnetic fields. The thickness range of the films, t=6--9 nm, was chosen so that the orbital and Zeeman contributions to their parallel critical fields were comparable. In this quasispin paramagnetically limited configuration, the field produces a significant suppression of the gap, and at high fields the gapless state is reached. By comparing measured and calculated tunneling spectra we are able to extract the value of the antisymmetric Fermi-liquid parameter G0 and thereby deduce the quasiparticle density dependence of the effective parameter Geff0 across the gapless state.