2008/07/03 by Peter J. Baker, P. J. Baker, Tom Lancaster +7
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.102.087002
published as Phys. Rev. Lett. 102, 087002 (2009) · 4 pages, 3 figures
arxiv created 2008/07/03 · openalex publication_date 2009/02/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Substantial control of the interlayer spacing in Bi-based high temperature superconductors has been achieved through the intercalation of guest molecules between the superconducting layers. Measurements using implanted muons reveal that the penetration depth increases with increasing layer separation while Tc does not vary appreciably, demonstrating that the bulk superfluid density is not the determining factor controlling Tc. Our results strongly suggest that for Bi-based high temperature superconductors the superfluid density appearing in the Uemura scaling relation rhos proportional, variantTc should be interpreted as the two-dimensional density within the superconducting layers, which we find to be constant for each class of system investigated.