2011/12/28 by Kazuki Ohishi, Yasuyuki Ishii, Ohishi, Kazuki +23
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Rare-earth and actinide compounds #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.1112.6078
openalex publication_date 2011/12/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The anisotropy and temperature dependence of the magnetic field penetration depth in the iron-based superconductor KFe2As2 have been measured down to 20 mK by means of muon spin rotation. We have observed that the flux-line lattice forms triangular symmetry when we applied the field parallel to c-axis, suggesting the interaction between vortices should be isotropic. The temperature dependence of the penetration depth observd with an applied field parallel and perpendicular to c-axis are different. These results can be accounted for by a superconducting gap function with a horizontal line node in the basal plane.