Microwave-induced resistance oscillations in a back-gated GaAs quantum well
X. Fu (University of Minnesota)
Q. A. Ebner (University of Minnesota Twin Cities)
Q. Shi (University of Minnesota)
M. A. Zudov (University of Minnesota Twin Cities)
Qinglin Qian (Purdue University)
J.D. Watson (Kavli institute of nanoscience Delft, TU Delft - QRD/Kouwenhoven Lab, Purdue University, TU Delft - QuTech Advanced Research Centre)
Michael J. Manfra (Purdue University)
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Abstract
We performed effective mass measurements employing microwave-induced resistance oscillation in a tunable-density GaAs/AlGaAs quantum well. Our main result is a clear observation of an effective mass increase with decreasing density, in general agreement with earlier studies which investigated the density dependence of the effective mass employing Shubnikov-de Haas oscillations. This finding provides further evidence that microwave-induced resistance oscillations are sensitive to electron-electron interactions and offer a convenient and accurate way to obtain the effective mass.