2004/08/31 by A. De Col, V. B. Geshkenbeǐn, V. B. Geshkenbein +1
Physics and Astronomy · #Advanced Chemical Physics Studies #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.94.097001
published as Phys. Rev. Lett. 94, 097001 (2005) · 4 pages, 1 figure; revised version, to appear in Phys. Rev. Lett
arxiv created 2005/03/03 · openalex publication_date 2005/03/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We discuss the zero field superconducting phase transition in a finite system of magnetically coupled superconducting layers. Transverse screening is modified by the presence of other layers resulting in topological excitations with fractional flux. Vortex stacks trapping a full flux and present at any finite temperature undergo a dissociation transition which corresponds to the depairing of fractional-flux vortices in individual layers. We propose an experiment with a bilayer system allowing us to identify the dissociation of bound vortex molecules.