High magnetic field millimetre and submillimetre spectroscopy of ultra-high mobility 2D hole systems

Hill, Stephen; Cole, Bryan E.; Singleton, John; Chamberlain, J.M.; Rodgers, P.J.; Janssen, T. J. B. M.; Pattenden, P.A.; Gallagher, B. L.; Hill, G.; Henini, M.

doi:10.1016/0921-4526(94)01088-i

Cited by 10 publications

(7 citation statements)

References 13 publications

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“…However, such anticrossings should exhibit strong discontinuities 12 and strong changes in the oscillation amplitudes, 28 which we do not observe.…”

Section: B Low Magnetic-field Regimecontrasting

confidence: 76%

“…[5][6][7][8][9][10][11][12][13][14] At first, 2DHSs in Si-metal-oxidesemiconductor ͑MOS͒ structures were investigated. 5 The first CR experiments on GaAs-based 2DHS were performed on Be-doped ͑100͒ samples.…”

Section: Introductionmentioning

confidence: 99%

“…At such samples, the nonparabolicity of 2DHS could be shown at ultralow-density samples. 8 In several publica-tions anticrossings between the Landau levels due to the low symmetry of the ͑311͒ direction were observed, [8][9][10][11][12] which, however, makes a comparison with theory very difficult. Other publications dealt with the influence of carrier-carrier interactions on the spin-split CRs.…”

Section: Introductionmentioning

confidence: 99%

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Cyclotron resonance of carbon-doped two-dimensional hole systems: From the magnetic quantum limit to low magnetic fields

et al. 2009

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We report on cyclotron resonance ͑CR͒ experiments of high-quality C-doped two-dimensional hole systems in GaAs/AlGaAs quantum wells covering the microwave and far-infrared regimes. At high magnetic field B we observe a strong B dependence of the cyclotron mass m c which can be reproduced by calculations based on a 4 ϫ 4 Luttinger Hamiltonian in the axial approximation. At small B one main and up to three secondary CRs are found, which continuously evolve with smooth magnetic-field dependences. This has not been observed and predicted so far. In the regime of the magnetic quantum limit a further CR is observed, which can be attributed to a transition between Landau levels originating from the two different spin-split heavy-and light-hole subbands.

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“…However, such anticrossings should exhibit strong discontinuities 12 and strong changes in the oscillation amplitudes, 28 which we do not observe.…”

Section: B Low Magnetic-field Regimecontrasting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cyclotron resonance of carbon-doped two-dimensional hole systems: From the magnetic quantum limit to low magnetic fields

et al. 2009

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“…This mixing is reflected in the experimental cyclotron resonance spectra [10]. The cavity measurements were carried out in a single-shot 3 He insert which allowed the sample temperature to be varied in the range 0.50-4.2 K.…”

Section: Methodsmentioning

confidence: 99%

“…0953-8984/97/153163+17$19.50 c 1997 IOP Publishing Ltd much less than the cyclotron energy, the 2DHS exhibits a wide range of effective masses, a large and complex non-parabolicity and a relatively large energy splitting of the hole spin states at finite wavevector in the absence of an applied magnetic field. Furthermore, all of these characteristics may be varied by adjustment of substrate orientation and/or confinement length [1][2][3]. In view of the very non-parabolic hole Landau levels, adjacent cyclotron resonance (inter-Landau-level) transitions may have very different energies, so when several Landau levels are populated, the occurrence of more than one cyclotron resonance seems likely; e.g.…”

Section: Introductionmentioning

confidence: 99%

Collective cyclotron modes in high-mobility two-dimensional hole systems in GaAs - (Ga, Al)As heterojunctions: I. Experiments at low magnetic fields and theory

Cole

Peeters

Ardavan

et al. 1997

J. Phys.: Condens. Matter

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The cyclotron resonance of very high-mobility two-dimensional holes in GaAs - (Ga, Al)As heterojunctions grown on (111), (311) and (100) substrates has been studied over the frequency range 30 to 200 GHz. Although the presence of two hole spin subbands in the samples suggests that two cyclotron resonances should be observed, in practice only a single resonance occurs for a wide range of conditions (temperature, field) and sample properties (hole density, mobility). Furthermore, the cyclotron resonance spectra often exhibit a strong temperature dependence. In the case of a single, sharp cyclotron resonance, the resonance field may shift by as much as 20% when warming the sample from 1.4 to 4.2 K. In the case of spectra containing multiple cyclotron resonances, similar changes in temperature shift the resonance positions together to form a single cyclotron absorption. This behaviour is explained in terms of two interacting hole subsystems with different effective masses formed by the two spin subbands. An analytical expression for the contribution to the high-frequency conductivity due to coupled cyclotron motion of the two hole systems is derived and shown to encompass previous theories developed for more restricted ranges of conditions. The expression predicts the complex behaviour of the experimental spectra very well, and enables hole masses, hole - lattice scattering rates and hole - hole scattering rates to be extracted. Comparisons between theory and data also show that a reactive interaction dominates the coupling between the spin subsystems at low temperatures. This is the first of two papers dealing with correlated hole cyclotron resonance; the second shows that the model derived in this work can also be used to treat cyclotron resonance data recorded at very high magnetic fields .

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Cyclotron Resonance Observation of Heavy and Light Spin Subbands in an Ultra-High Mobility 2D Hole Gas in GaAs/(Al,Ga)As: Evidence for Coupled Magnetoplasmons and Many Body Effects

Cole

Hill

Polisskii

et al. 1996

Hot Carriers in Semiconductors

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High magnetic field millimetre and submillimetre spectroscopy of ultra-high mobility 2D hole systems

Cited by 10 publications

References 13 publications

Cyclotron resonance of carbon-doped two-dimensional hole systems: From the magnetic quantum limit to low magnetic fields

Cyclotron resonance of carbon-doped two-dimensional hole systems: From the magnetic quantum limit to low magnetic fields

Collective cyclotron modes in high-mobility two-dimensional hole systems in GaAs - (Ga, Al)As heterojunctions: I. Experiments at low magnetic fields and theory

Cyclotron Resonance Observation of Heavy and Light Spin Subbands in an Ultra-High Mobility 2D Hole Gas in GaAs/(Al,Ga)As: Evidence for Coupled Magnetoplasmons and Many Body Effects

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