  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.

Superconductivity