Angular dependence of the magnetic-field driven superconductor-insulator transition in thin films of amorphous indium-oxide

摘要

A significant anisotropy of the magnetic-field drivensuperconductor-insulator transition is observed in thin films of amorphousindium-oxide. The anisotropy is largest for more disordered films which have alower transition field. At higher magnetic field the anisotropy reduces andeven changes sign beyond a sample specific and temperature independent magneticfield value. The data are consistent with the existence of more that onemechanism affecting transport at high magnetic fields.