Theory of hopping conduction in two-dimensional impurity band under strong magnetic field

Abstract

It is shown that the low-temperature conductivity in two-dimensional impurity band of n-type inversion layer under strong magnetic field is σ xx( min)=σ 0 exp[−( T 0 T ) 1 2 ] . Therefore the effective conductivity of inversion layer σ eff = σ 2 xy σ xx ( min) at Shubnikov-de Haas conductivity minima may be very high at low temperature.