Magnetoresistance in a High Mobility Two-Dimensional Electron Gas

L. Bockhorn, P. Barthold, D. Schuh, W. Wegscheider, R. J. Haug

Published 2010-12-01Version 1

In a high mobility two-dimensional electron gas (2DEG) in a GaAs/AlGaAs quantum well we observe a strong magnetoresistance. In lowering the electron density the magnetoresistance gets more pronounced and reaches values of more than 300%. We observe that the huge magnetoresistance vanishes for increasing the temperature. An additional density dependent factor is introduced to be able to fit the parabolic magnetoresistance to the electron-electron interaction correction.