2013/05/25 by S. Guénon, Stefan Guénon, Y. J. Rosen +4 · 1 citation
Mathematics · Physics and Astronomy · #Commensurability (mathematics) #Condensed matter physics #Critical current #Flux pinning #Geometry #High-temperature superconductivity #Lattice (music) #Magnetic field #Magnetic properties of thin films #Materials science #Mathematics #Physics #Physics of Superconductivity and Magnetism #Pinning force #Quantum and electron transport phenomena #Quantum mechanics #Superconductivity #Vortex #cond-mat.supr-con
paper · pdf · doi:10.1063/1.4811413
submitted to APL on 29/04/13
arxiv created 2013/05/25 · openalex publication_date 2013/06/24 · arxiv updated 2015/06/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We have investigated the vortex dynamics in superconducting thin film devices with non-uniform patterns of artificial pinning centers (APCs). The magneto-transport properties of a conformal crystal and a randomly diluted APC pattern are compared with that of a triangular reference lattice. We have found that in both cases the magneto-resistance below the first matching field of the triangular reference lattice is significantly reduced. For the conformal crystal, the magneto-resistance is below the noise floor indicating highly effective vortex pinning over a wide magnetic field range. Further, we have discovered that for asymmetric patterns the R vs. H curves are mostly symmetric. This implies that the enhanced vortex pinning is due to the commensurability with a stripe in the non-uniform APC pattern and not due to a rearrangement and compression of the whole vortex lattice.