Scaling analysis of the magnetic field-tuned quantum transition in superconducting amorphous In-O films

We studied the magnetic field-tuned superconductor-insulator transition (SI T) in amorphous In-O films with different oxygen contents and, hence, diffe rent electron densities. Whereas the two-dimensional scaling behavior was c onfirmed for the states of the film near the zero-field SIT, the SIT scenar io changed for the deeper states in the superconducting phase; in addition to the scaling function describing the conductivity of the fluctuation-indu ced Cooper pairs, the temperature-dependent contribution to the film resist ance emerged. This contribution can originate from the conductivity of norm al electrons. (C) 2000 MAIK "Nauka/Interperiodica".