2021/05/03 by P. S. Alekseev, Alekseev, P. S., A. P. Alekseeva +1
Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #Statistical Mechanics (cond-mat.stat-mech) #Strongly Correlated Electrons (cond-mat.str-el)
paper · pdf · doi:10.48550/arxiv.2105.01035
openalex publication_date 2021/05/03 · openalex created_date 2021/05/10 · openalex updated_date 2026/07/28
Magnetotransport phenomena often provide critically important information about two-dimensional (2D) electron systems. For example, the independence of magneto-photo-resistance of 2D electrons in best-quality quantum wells on the polarization helicity of incident radio-frequency radiation have been treated as a puzzling effect, which is important for characterization of these systems, but had no well-established explanation up to now. Here we develop a phenomenological model of dynamics of a highly correlated 2D electron fluid in moderate magnetic fields, in which shear viscosity and the memory effects in inter-particle interaction are crucial. In this system, successive collisions of electrons joined in pairs (that is, the pair correlations in time) turn out to be as important as uncorrelated collisions of statistically independent electrons. The resulting photoresistance exhibits an irregular shape of magnetooscillations, the absence of the dependence on the helicity of the circular polarization of radiation, and a giant peak near the doubled cyclotron frequency. All these effects were observed in experiments on best-quality GaAs quantum wells in moderate magnetic fields at low temperatures. Although the most general conditions of applicability of the developed phenomenological model is not fully clarified at now, this coincidence can point out that 2D electrons in such systems form the highly correlated viscous fluid.