2008/04/19 by H. Luetkens, H. -H. Klauss, H.‐H. Klauß +12 · 2 citations
Business, Management and Accounting · Materials Science · Physics and Astronomy · #BCS theory #Condensed matter physics #Corporate Taxation and Avoidance #Cuprate #Field (mathematics) #Iron-based superconductors research #Lambda #London penetration depth #Penetration depth #Physics #Quantum mechanics #Rare-earth and actinide compounds #Relaxation (psychology) #Superconductivity #Superfluidity #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.101.097009
published as Phys. Rev. Lett. 101, 097009 (2008) · 5 pages, 5 figures
arxiv created 2008/04/19 · openalex publication_date 2008/08/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present zero field and transverse field muon spin relaxation experiments on the recently discovered Fe-based superconductor LaFeAsO_1\ensuremath-xFx (x=0.075 and x=0.1). The temperature dependence of the deduced superfluid density is consistent with a BCS s-wave or a dirty d-wave gap function, while the field dependence strongly evidences unconventional superconductivity. We obtain the in-plane penetration depth of \ensuremathλab(0)=254(2) nm for x=0.1 and \ensuremathλab(0)=364(8) nm for x=0.075. Further evidence for unconventional superconductivity is provided by the ratio of Tc versus the superfluid density, which is close to the Uemura line of high-Tc cuprates.