2002/10/10 by Ju H. Kim, J. Pokharel, Jhabindra Pokharel · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.supr-con
paper · pdf · doi:10.1016/s0921-4534(02)02015-4
27 pages, 6 figures, to appear in Physica C (2002)
arxiv created 2002/10/10 · openalex publication_date 2003/01/17 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate the collective phase dynamics in conventional long Josephson junction (LJJ) stacks and in layered superconductors, exhibiting intrinsic LJJ behaviors. Using a theoretical model which accounts for both the magnetic induction effect and the breakdown of local charge neutrality (i.e., charging effect), we show that the collective motion of Josephson vortices, including the dispersion of Josephson plasma mode and the Swihart-type velocity, in an intrinsic LJJ stack such as Bi2Sr2CaCu2O8+y (BSCCO) is significantly modified from those in a conventional LJJ stack. In BSCCO, the strength of the charging effect α is small (i.e., α∼ 0.1-0.4), but it leads to notable changes in collective phase dynamics, including changes to the stability condition. Also, we show that splitting of the supercurrent branch in the resistive state is due to collective motion of Josephson vortices. The width of spread of these sub-branches in the linear current-voltage regime depends on α, suggesting another way to measure the charging effect in BSCCO.