Effects of Spin Polarization on Electron Transport in Modulation Doped Cd(1-x)Mn(x)Te/Cd(1-y)Mg(y)Te:I Heterostructures

摘要

We examine and identify magnetoresistance mechanisms in 2D system containinga sizable concentration of magnetic ions. We argue that some of thesemechanisms can serve as a tool to measure spin polarization. Lack of spindegeneracy and enhanced localization make it possible to detect an additionalQHE plateau associated with extended states floating-up in vanishing magneticfield.