Negative parabolic magneto-resistance induced by electron–electron interaction in two-dimensional electron gas with diffusive transport

We experimentally study the parabolic negative magneto-resistance (NMR) in high density View the MathML source and low mobility View the MathML source two-dimensional (2D) electron gas realized by δ-doping a narrow View the MathML source AlGaAs/GaAs/AlGaAs quantum well. We show that the parabolic NMR in this 2DEG is well described by the theory which connects the parabolic NMR to the existing quantum logarithmic correction to the conductivity of the 2D electron system in the case of the diffusive transport.