Scaling behaviors of magneto conductivity in amorphous indium oxide near the metal-insulator transition

Magnetoconductivity is measured in an amorphous indium-oxide sample which i s in the microscopic region. Two different scaling behaviors are observed f or the magnetoconductivity The scaling behavior is determined by either the localization or the electron correlation effects, whichever becomes strong er more rapidly at a given temperature and magnetic field. Qualitative expl anations are given for the observed scaling behaviors. A curve of a functio n of H/T-2/3 exists on which all our magnetoconductivity data lie.