Circular-Polarization-Dependent Study of Microwave-Induced Conductivity Oscillations in a Two-Dimensional Electron Gas on Liquid Helium

Abstract

The polarization dependence of photoconductivity response at cyclotron-resonance harmonics in a nondegenerate two-dimensional (2D) electron system formed on the surface of liquid helium is studied using a setup in which a circular polarization of opposite directions can be produced. Contrary to the results of similar investigations reported for semiconductor 2D electron systems, for electrons on liquid helium, a strong dependence of the amplitude of magnetoconductivity oscillations on the direction of circular polarization is observed. This observation is in accordance with theoretical models based on photon-assisted scattering and, therefore, it solves a critical issue in the dispute over the origin of microwave-induced conductivity oscillations.

arXiv comment5 pages, 4 figures

References in corpus (14)

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Cited by in corpus (11)

• Observation of terahertz-induced magnetooscillations in graphene
• Demonstration of high sensitivity of microwave-induced resistance oscillations to circular polarization
• 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
• Magneto-oscillations and anomalous current states in a photo-excited electron gas on liquid helium
• Observation of High Harmonics of the Cyclotron Resonance in Microwave Transmission of a High-Mobility Two-Dimensional Electron System
• Acousto-electric study of microwave-induced current domains
• Strong coupling of two-dimensional electron ensemble to a single-mode cavity resonator
• Circular polarization immunity of the cyclotron resonance photoconductivity in two-dimensional electron systems
• Can warmer than room temperature electrons levitate above a liquid helium surface ?
• Precision measurements of the zero temperature dielectric constant and density of liquid ${}^4$He