Determination of Physical Parameters of the Anderson Localization in Metallic n-InSb

抄録

The temperature and magnetic field dependences of conductivity of metallic n-InSb with carrier concentration n=N_D−N_A=3.93×10¹⁴ cm⁻³ and k_Fl₀=2E_Fτ⁄h=2.85>1 have been analyzed with the recent theory of the Anderson localization. In accordance with prediction of the theory, various kinks have been found when the conductivities are plotted as functions of T^1⁄2 (T: temperature) and H^1⁄2 (H: magnetic field). All the values of physical parameters of the Anderson localization, i.e., the coefficient of H^1⁄2 due to the localization and the strength of various processes due to the Coulomb interaction have been determined. It was found that the experimental values of parameters are in semiquantitative agreement with the theoretical values.