2002/01/15 by A. Gurevich, M. S. Rzchowski, G. Daniels +5 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Iron-based superconductors research #Physics of Superconductivity and Magnetism #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.88.097001
5 pages 5 figures. Phys. Rev. Lett. (accepted)
arxiv created 2002/01/15 · openalex publication_date 2002/02/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Low-angle grain boundaries (GBs) in superconductors exhibit intermediate Abrikosov vortices with Josephson cores, whose length l along GB is smaller than the London penetration depth, but larger than the coherence length. We found an exact solution for a periodic vortex structure moving along GBs in a magnetic field H and calculated the flux flow resistivity RF(H), and the nonlinear voltage-current characteristics. The predicted RF(H) dependence describes well our experimental data on 7\ifmmode^∘\else\textdegree\fi unirradiated and irradiated YBa2Cu3O7 bicrystals, from which the core size l(T), and the intrinsic depairing density Jb(T) on nanoscales of a few GB dislocations were measured for the first time. The observed Jb(T)\phantom\rule0ex0ex=\phantom\rule0ex0exJb0(1\ensuremath-T/Tc)2 indicates a significant order parameter suppression on GB.