2015/02/28 by H. Q. Nguyen, Hung Q. Nguyen, S. M. Hollen +7
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Electronic and Structural Properties of Oxides #Flux pinning #High-temperature superconductivity #Josephson effect #Magnetic field #Magnetic flux #Magnetic flux quantum #Materials science #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum critical point #Quantum mechanics #Quantum phase transition #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.92.140501
published as Phys. Rev. B 92, 140501 (2015)
openalex publication_date 2015/10/07 · arxiv created 2015/10/15 · arxiv updated 2015/10/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We isolated flux disorder effects on the transport at the critical point of the quantum magnetic field tuned superconductor-to-insulator transition (BSIT). The experiments employed films patterned into geometrically disordered hexagonal arrays. Spatial variations in the flux per unit cell, which grow in a perpendicular magnetic field, constitute flux disorder. The growth of flux disorder with magnetic field limited the number of BSITs exhibited by a single film due to flux matching effects. The critical metallic resistance at successive BSITs grew with flux disorder contrary to predictions of its universality. These results open the door for controlled studies of disorder effects on the universality class of an ubiquitous quantum phase transition.