Evidence for effective mass reduction in GaAs/AlGaAs quantum wells

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.

References in corpus (21)

• Theory of microwave-induced oscillations in the magnetoconductivity of a 2D electron gas
• Nonequilibrium phenomena in high Landau levels
• Measurements of the density-dependent many-body electron mass in 2D GaAs/AlGaAs Heterostructures
• Magnetotransport in a two-dimensional electron system in dc electric fields
• Mechanisms of the microwave photoconductivity in 2D electron systems with mixed disorder
• Giant negative magnetoresistance in high-mobility 2D electron systems
• Temperature Dependence of Microwave Photoresistance in 2D Electron Systems
• Magnetoresistance Oscillations in Two-dimensional Electron Systems Induced by AC and DC Fields
• Bichromatic Microwave Photoresistance of Two-Dimensional Electron System
• Giant microwave photoresistivity in a high-mobility quantum Hall system
• Degenerate states of narrow semiconductor rings in the presence of spin orbit coupling: Role of time-reversal and large gauge transformations
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• Non-linear magnetotransport in microwave-illuminated two-dimensional electron systems
• Density dependent spin susceptibility and effective mass in interacting quasi-two dimensional electron systems
• Microwave Photoresistance in dc-driven 2D Systems at Cyclotron Resonance Subharmonics
• Multiphoton microwave photoresistance in a high-mobility two-dimensional electron gas
• Microwave induced magnetoresistance oscillations at the subharmonics of the cyclotron resonance
• Microwave photoresistance in a two-dimensional electron gas with separated Landau levels
• Non-linear response of a high mobility two-dimensional electron system near the second harmonic of the cyclotron resonance
• From semiclassical transport to quantum Hall effect under low-field Landau quantization
• Magnetoplasmon resonance in 2D electron system driven into a zero-resistance state

Cited by in corpus (18)

• Observation of microwave-induced resistance oscillations in strained Ge/SiGe quantum wells
• Comparative study of microwave radiation-induced magnetoresistive oscillations induced by circularly- and linearly- polarized photo-excitation
• Nonlinear spectra of spinons and holons in short GaAs quantum wires
• Microwave-Induced Oscillations in the Magnetocapacitance: Direct Evidence for Non-equilibrium Occupation of Electronic States
• Microwave-induced resistance oscillations in a back-gated GaAs quantum well
• Tuning the electrically evaluated electron Lande g factor in GaAs quantum dots and quantum wells of different well widths
• Scattering mechanisms in state-of-the-art GaAs/AlGaAs quantum wells
• Observing separate spin and charge Fermi seas in a strongly correlated one-dimensional conductor
• Observation of High Harmonics of the Cyclotron Resonance in Microwave Transmission of a High-Mobility Two-Dimensional Electron System
• Microwave response of interacting oxide two-dimensional electron systems
• Isotropically conducting (hidden) quantum Hall stripe phases in a two-dimensional electron gas
• Resistively detected high-order magnetoplasmons in a high-quality 2D electron gas
• Effect of illumination on quantum lifetime in GaAs quantum wells
• Enhanced mobility of ternary InGaAs quantum wells through digital alloying
• Hidden Quantum Hall Stripes in Al${}_x$Ga${}_{1-x}$As/Al${}_{0.24}$Ga${}_{0.76}$As Quantum Wells
• Bound state-continuum resonance transition in a shallow quantum well
• Decoupling of the many-body effects from the electron mass in GaAs by means of reduced dimensionality
• Oscillatory photoresistance on the high field side of the cyclotron resonance