2008/06/30 by G. Fuchs, S.‐L. Drechsler, S. -L. Drechsler +18 · 2 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.101.237003
published as Phys. Rev. Lett. v. 101, 237003 (2008) · Change of the title as suggested by the Editors, one author added, typos corrected, references updated, final published version
openalex publication_date 2008/12/04 · arxiv created 2009/02/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We report upper critical field Bc2(T) data for disordered (arsenic-deficient) LaO0.9F0.1FeAs_1\ensuremath-\ensuremathδ in a wide temperature and magnetic field range up to 47 T. Because of the large linear slope of Bc2\ensuremath≈\ensuremath-5.4 to \ensuremath-6.6 T/K near Tc\ensuremath≈28.5 K, the T dependence of the in-plane Bc2(T) shows a flattening near 23 K above 30 T which points to Pauli-limited behavior with Bc2(0)\ensuremath≈63--68 T. Our results are discussed in terms of disorder effects within conventional and unconventional superconducting pairings.