Phase Separation in Two-Dimensional Electron Systems: Experimental View

Abstract

Key experimental results on unveiling and studying properties of a multiphase state that arises in two-dimensional electron systems due to the interplay of interelectron interactions and disorder are reviewed. The review focuses on the experimental results obtained with high mobility Si-field effects structures (Si-MOS), in which the interaction effects at low carrier concentrations are most pronounced due to the strong e-e interactions, multi-valley spectrum, and the short-range character of the random potential. The reviewed effects of phase separation include features in transport, magnetotransport and thermodynamics. Consideration of a number of experimental results is supplemented with a brief review of their theoretical interpretation.

16 pages, 16 figures. Updated version of the brief review in JETP Letters (2022)

References in corpus (10)

• Thermodynamic density of states of two-dimensional GaAs systems near the apparent metal-insulator transition
• Spin-Droplet State of an Interacting 2D Electron System
• Nonlinear screening and percolative transition in a two-dimensional electron liquid
• Probing Electron Interactions in a Two-Dimensional System by Quantum Magneto-Oscillations
• Thermodynamic magnetization of two-dimensional electron gas measured over wide range of densities
• Novel Energy Scale in the Interacting 2D Electron System Evidenced from Transport and Thermodynamic Measurements
• Two-dimensional system of strongly interacting electrons in silicon (100) structures
• Electrostatics of two-dimensional structures: exact solutions and approximate methods
• Temperature derivative of the chemical potential and its magnetooscillations in two-dimensional system
• Magnetic-field-driven redistribution between extended and localized electronic states in high-mobility Si MOSFETs at low temperatures