Disorder-Induced Inhomogeneities of the Superconducting State Close to the Superconductor-Insulator Transition

Scanning tunneling spectroscopy at very low temperatures on homogeneously disordered superconducting titanium nitride thin films reveals strong spatial inhomogeneities of the superconducting gap Delta in the density of states. Upon increasing disorder, we observe suppression of the superconducting c... View More