Composite Flux-Line Lattices Stabilized in Superconducting Films by a Regular Array of Artificial Defects

作者：M. Baert, V. V. Metlushko, R. Jonckheere, V. V. Moshchalkov, Y. Bruynseraede · 发表于：Physical Review Letters · 年份：1995 · DOI：10.1103/physrevlett.74.3269 · 被引用次数：564 · 研究领域：Physics of Superconductivity and Magnetism、Superconducting Materials and Applications、Iron-based superconductors research

Flux creep rate and critical current have been measured in superconducting Pb $/$Ge multilayers with a square lattice of submicron holes. The new composite flux-line lattices consisting of single or multiquanta vortices at holes and single cortices at interstitial positions have been identified. The ``metallic'' behavior of the flux lines at the interstices at temperatures close to the critical temperature leads to a first-order phase transition analogous to the Mott insulator-metal transition for flux lines, introduced by Nelson and Vinokur.