Circular polarization immunity of the cyclotron resonance photoconductivity in two-dimensional electron systems
arXiv:2206.07617 · doi:10.1103/PhysRevB.106.L161409
Abstract
Studying the cyclotron resonance (CR)-induced photoconductivity in GaAs and HgTe two-dimensional electron structures, we observed an anomalous photoresponse for the CR-inactive geometry being of almost the same magnitude as the CR-active one. This observation conflicts with simultaneous transmission measurements and contradicts the conventional theory of CR which predicts no resonant response for the CR-inactive geometry. We provide a possible route to explain this fundamental failure of the conventional description of light-matter interaction and discuss a modified electron dynamics near strong impurities that may provide a local near-field coupling of the two helicity modes of the terahertz field at low temperatures. This should result in a CR-enhanced local absorption and, thus, CR photoconductivity for both magnetic field polarities.
arXiv comment21 pages, 20 figures
References in corpus (19)
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Quantum Spin Hall Insulator State in HgTe Quantum Wells
- Evidence for a New Dissipationless Regime in 2D Electronic Transport
- Nonequilibrium phenomena in high Landau levels
- Circular polarization dependent study of the microwave photoconductivity in a two-dimensional electron system
- Microwave-induced magnetotransport phenomena in two-dimensional electron systems: Importance of electrodynamic effects
- Superradiant Decay of Cyclotron Resonance of Two-Dimensional Electron Gases
- Quasiclassical negative magnetoresistance of a 2D electron gas: interplay of strong scatterers and smooth disorder
- Giant spin-polarized current in a Dirac fermion system at cyclotron resonance
- Photogalvanic probing of helical edge channels in 2D HgTe topological insulators
- Oscillatory ac- and photoconductivity of a 2D electron gas: Quasiclassical transport beyond the Boltzmann equation
- Microwave-induced resistance oscillations as a classical memory effect
- Tuning of structure inversion asymmetry by the -doping position in (001)-grown GaAs quantum wells
- Circular-Polarization-Dependent Study of Microwave-Induced Conductivity Oscillations in a Two-Dimensional Electron Gas on Liquid Helium
- Demonstration of high sensitivity of microwave-induced resistance oscillations to circular polarization
- Cyclotron resonance in antidot arrays
- Sign-alternating photoconductivity and magnetoresistance oscillations induced by terahertz radiation in HgTe quantum wells
- Floquet theory of microwave absorption by an impurity in two dimensional electron gas
- Observation of High Harmonics of the Cyclotron Resonance in Microwave Transmission of a High-Mobility Two-Dimensional Electron System