Evidence for effective mass reduction in GaAs/AlGaAs quantum wells

A. T. Hatke; M. A. Zudov; J. D. Watson; M. J. Manfra; L. N. Pfeiffer; K. W. West

doi:10.1103/PhysRevB.87.161307

Evidence for effective mass reduction in GaAs/AlGaAs quantum wells

A. T. Hatke, M. A. Zudov, J. D. Watson, M. J. Manfra, L. N. Pfeiffer, K. W. West

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

We have performed microwave photoresistance measurements in high mobility GaAs/AlGaAs quantum wells and investigated the value of the effective mass. Surprisingly, the effective mass, obtained from the period of microwave-induced resistance oscillations, is found to be about 12% lower than the band mass in GaAs, mb. This finding provides strong evidence for electron-electron interactions which can be probed by microwave photoresistance in very high Landau levels. In contrast, the measured magnetoplasmon dispersion revealed an effective mass which is close to mb, in accord with previous studies.

Original language	English (US)
Article number	161307
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	87
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.87.161307
State	Published - Apr 26 2013
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.87.161307

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abstract = "We have performed microwave photoresistance measurements in high mobility GaAs/AlGaAs quantum wells and investigated the value of the effective mass. Surprisingly, the effective mass, obtained from the period of microwave-induced resistance oscillations, is found to be about 12% lower than the band mass in GaAs, mb. This finding provides strong evidence for electron-electron interactions which can be probed by microwave photoresistance in very high Landau levels. In contrast, the measured magnetoplasmon dispersion revealed an effective mass which is close to mb, in accord with previous studies.",

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AU - Zudov, M. A.

AU - Watson, J. D.

AU - Manfra, M. J.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 2013/4/26

Y1 - 2013/4/26

N2 - We have performed microwave photoresistance measurements in high mobility GaAs/AlGaAs quantum wells and investigated the value of the effective mass. Surprisingly, the effective mass, obtained from the period of microwave-induced resistance oscillations, is found to be about 12% lower than the band mass in GaAs, mb. This finding provides strong evidence for electron-electron interactions which can be probed by microwave photoresistance in very high Landau levels. In contrast, the measured magnetoplasmon dispersion revealed an effective mass which is close to mb, in accord with previous studies.

AB - We have performed microwave photoresistance measurements in high mobility GaAs/AlGaAs quantum wells and investigated the value of the effective mass. Surprisingly, the effective mass, obtained from the period of microwave-induced resistance oscillations, is found to be about 12% lower than the band mass in GaAs, mb. This finding provides strong evidence for electron-electron interactions which can be probed by microwave photoresistance in very high Landau levels. In contrast, the measured magnetoplasmon dispersion revealed an effective mass which is close to mb, in accord with previous studies.

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Evidence for effective mass reduction in GaAs/AlGaAs quantum wells

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