2016/10/31 by Ivan Sadovskyy, I. A. Sadovskyy, Y. L. Wang +7
Chemistry · Physics and Astronomy · #Chemistry #Condensed matter physics #Critical current #Current (fluid) #Distortion (music) #Ginzburg–Landau theory #Hexagonal crystal system #Magnetic field #Magnetic properties of thin films #Materials science #Mechanics #Nanotechnology #Optoelectronics #Physics #Physics of Superconductivity and Magnetism #Pinning force #Quantum and electron transport phenomena #Superconductivity #Thin film #Vortex #cond-mat.mes-hall #cond-mat.mtrl-sci #cond-mat.supr-con #physics.comp-ph
paper · pdf · doi:10.1103/physrevb.95.075303
published as Phys. Rev. B 95, 075303 (2017) · 10 pages, 8 figures
arxiv created 2017/02/01 · openalex publication_date 2017/02/07 · arxiv updated 2017/02/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Understanding the effect of pinning on the vortex dynamics in superconductors is a key factor towards controlling critical current values. Large-scale simulations of vortex dynamics can provide a rational approach to achieve this goal. Here, we use the time-dependent Ginzburg-Landau equations to study thin superconducting films with artificially created pinning centers arranged periodically in hexagonal lattices. We calculate the critical current density for various geometries of the pinning centers---varying their size, strength, and density. Furthermore, we shed light upon the influence of pattern distortion on the magnetic-field-dependent critical current. We compare our result directly with available experimental measurements on patterned molybdenum-germanium films, obtaining good agreement. Our results give important systematic insights into the mechanisms of pinning in these artificial pinning landscapes and open a path for tailoring superconducting films with desired critical current behavior.