2006/08/31 by Hendrik Bluhm, Nicholas C. Koshnick, M. E. Huber +2 · 1 citation
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.97.237002
published as Phys. Rev. Lett. 97, 237002 (2006) · 4 pages, 3 figures. See http://stanford.edu/group/moler/publications.html for the auxiliary document describing some of the analysis procedures (Ref. 25). Journal version. Rewritten introduction. Some sentences added, some removed, changes in wording. Corrected a few errors, updated references
openalex publication_date 2006/12/04 · arxiv created 2006/12/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The magnetic response and fluxoid transitions of superconducting aluminum rings of various sizes, deposited under conditions likely to generate a layered structure, show good agreement with a two-order-parameter Ginzburg-Landau model. For intermediate couplings, we find metastable states that have different phase winding numbers around the ring in each of the two order parameters. Those states, previously theoretically predicted, are analogous to fractional vortices in singly connected samples with two-order-parameter superconductivity. Larger coupling locks the relative phase so that the two order parameters are only manifest in the temperature dependence of the response. With increasing proximitization, this signature gradually disappears.