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Effective mass from microwave photoresistance measurements in GaAs/AlGaAs quantum wells

Journal of Physics: Conference Series, ISSN: 1742-6596, Vol: 456, Issue: 1
2013
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Conference Paper Description

We have performed microwave photoresistance measurements in high mobility GaAs/AlGaAs quantum wells and investigated the value of the effective mass. The effective mass, obtained from the period of microwave-induced resistance oscillations (MIRO), was found to be about 12 % lower than the band mass in GaAs, m*. In contrast, the measured magneto-plasmon dispersion (MPR) revealed an effective mass which is close to m*, in accord with previous studies. These findings suggest that, in contrast to MPR, the MIRO dispersion contains corrections due to electron-electron interaction effects. © Published under licence by IOP Publishing Ltd.

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