Resonance peak shift in the photo-current of ultrahigh-mobility two-dimensional electron systems
arXiv:2003.04869 · doi:10.1103/PhysRevB.101.115419
Abstract
We report on a theoretical study on the rise of strong peaks at the harmonics of the cyclotron resonance in the irradiated magnetoresistance in ultraclean two-dimensional electron systems. The motivation is the experimental observation of a totally unexpected strong resistance peak showing up at the second harmonic. We extend the radiation-driven electron orbit model (previously developed to study photocurrent oscillations and zero resistance states) to a ultraclean scenario that implies longer scattering time and longer mean free path. Thus, when the mean free path is equivalent, in terms of energy, to twice the cyclotron energy (), the electron behaves as under an effective magnetic field twice the one really applied. Then, at high radiation power and/or low temperature, a resistance spike can be observed {\it at the second harmonic}. For even cleaner samples the energy distance could increase to three or four times the cyclotron energy giving rise to resistance peaks at higher harmonics (third, fourth, etc.), i.e., a resonance peak shift to lower magnetic fields as the quality of the sample increases. Thus, by selecting the sample mobility one automatically would select the radiation resonance response without altering the radiation frequency.
Accepted in Physical Review B 6 pages, 5 figures
References in corpus (14)
- Radiation-induced oscillatory magnetoresistance as a sensitive probe of the zero-field spin splitting in high mobility GaAs/AlGaAs devices
- Nonlinear growth with the microwave intensity in radiation-induced magnetoresistance oscillations
- Observation of linear-polarization-sensitivity in the microwave-radiation-induced magnetoresistance oscillations
- Phase study of oscillatory resistances in microwave-irradiated- and dark- GaAs/AlGaAs devices: Indications of a new class of integral quantum Hall effect
- Giant microwave photoresistivity in a high-mobility quantum Hall system
- Microwave zero-resistance states in a bilayer electron system
- Microwave photoresistance of a high-mobility two-dimensional electron gas in a triangular antidot lattice
- Effect of frequency and temperature on microwave-induced magnetoresistance oscillations in two-dimensional electron systems
- Magnetoresistivity Modulated Response in Bichromatic Microwave Irradiated Two Dimensional Electron Systems
- Anharmonic behavior in Microwave-driven resistivity oscillations in Hall bars
- Combined study of microwave-power/linear-polarization dependence of the microwave-radiation-induced magnetoresistance oscillations in GaAs/AlGaAs devices
- Comparative study of microwave radiation-induced magnetoresistive oscillations induced by circularly- and linearly- polarized photo-excitation
- Crossover between distinct mechanisms of microwave photoresistance in bilayer systems
- Hysteretic behavior in weakly coupled double-dot transport in the spin blockade regime