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

A significant anisotropy of the magnetic-field driven superconductor–insulator transition is observed in thin films of amorphous indium-oxide. The anisotropy is largest for more disordered films which have a lower transition field. At higher magnetic fields the anisotropy reduces and even changes sign beyond a sample specific and temperature independent magnetic field value. The data are consistent with the existence of more than one mechanism affecting transport at high magnetic fields.

Research highlights► The superconductor–insulator transition as a function of magnetic field orientations. ► Two distinct mechanisms are identified to affect transport near the transition. ► The high field insulating peak exists in parallel orientation.