Two-dimensional system of strongly interacting electrons in silicon (100) structures

Abstract

Studies of different experimental groups that explore the properties of a two-dimensional electron gas in silicon semiconductor systems ((100) Si metal-oxide-semiconductor field-effect transistors (MOSFETs) and (100) SiGe/Si/SiGe quantum wells) in the vicinity of the metal-insulator transition are described and critically analyzed. Results are identified that are common to all research: (i) the effective mass of electrons measured at the Fermi level in the metallic regime increases as the electron density decreases and, if extrapolated, tends to diverge; (ii) the behavior of the energy-averaged mass in the metallic region is quite different in the two systems: in Si-MOSFETs, it also exhibits a tendency to diverge, while in the SiGe/Si/SiGe quantum wells it saturates in the limit of low electron densities; (iii) there is a small number (depending on the sample quality) of localized electrons in the metallic phase; (iv) the properties that the electron system exhibits in the insulating phase in the vicinity of the metal-insulator transition are typical of amorphous media with a strong coupling between particles.

References in corpus (51)

• Metallic behavior and related phenomena in two dimensions
• Possible Metal/Insulator Transition at B=0 in Two Dimensions
• Metal-insulator transition in two-dimensional electron systems
• Interaction corrections at intermediate temperatures: I. Longitudinal conductivity and kinetic equation
• Metal-Insulator Transition in Disordered Two-Dimensional Electron Systems
• The low-density spin susceptibility and effective mass of mobile electrons in Si inversion layers
• Indication of the ferromagnetic instability in a dilute two-dimensional electron system
• Sharp increase of the effective mass near the critical density in a metallic 2D electron system
• Dilute electron gas near the metal-insulator transition in two dimensions
• Spin-independent origin of the strongly enhanced effective mass in a dilute 2D electron system
• Scaling of the magnetoconductivity of silicon MOSFET's: evidence for a quantum phase transition in two dimensions
• Global phase diagram for the quantum Hall effect: An experimental picture
• Metal-insulator transitions and the effects of electron-electron interactions in two-dimensional electron systems
• The thermodynamic spin magnetization of strongly correlated 2d electrons in a silicon inversion layer
• Melting of the Electron Glass
• Small Angle Shubnikov-de Haas Measurements in Silicon MOSFET's: the Effect of Strong In-Plane Magnetic Field
• Flow diagram of the metal-insulator transition in two dimensions
• Universal Behavior of the Resistance Noise across the Metal-Insulator Transition in Silicon Inversion Layers
• Coulomb Correlations and the Wigner-Mott Transition
• Pauli spin susceptibility of a strongly correlated two-dimensional electron liquid
• Metal-insulator transition in a 2D electron gas: Equivalence of two approaches for determining the critical point
• Glassy behavior of electrons near metal-insulator transitions
• Metallic low-temperature resistivity in 2D over an extended temperature range
• Critical Behavior of a Strongly Interacting 2D Electron System
• Weak anisotropy and disorder dependence of the in-plane magnetoresistance in high mobility (100) Si-inversion layers
• Strongly correlated two-dimensional plasma explored from entropy measurements
• Spin-Droplet State of an Interacting 2D Electron System
• Novel Phenomena in Dilute Electron Systems in Two Dimensions
• Localized - delocalized electron quantum phase transitions
• Ultra-high mobility two-dimensional electron gas in a SiGe/Si/SiGe quantum well
• Transport evidence for a sliding two-dimensional quantum electron solid
• Metal-Insulator Transition in 2D: Experimental Test of the Two-Parameter Scaling
• Magnetization of a strongly interacting two-dimensional electron system in perpendicular magnetic fields
• Indication of band flattening at the Fermi level in a strongly correlated electron system
• Interaction Effects in Conductivity of a Two-Valley Electron System in High-Mobility Si Inversion Layers
• Quantum phase transition in ultrahigh mobility SiGe/Si/SiGe two-dimensional electron system
• Maximum Metallic Conductivity in Si-MOS Structures
• The energy scale behind the metallic behaviors in low-density Si-MOSFETs
• 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
• Highly enhanced thermopower in two-dimensional electron systems at milliKelvin temperatures
• Novel metallic behavior in two dimensions
• Effects of a Parallel Magnetic Field on the Metal-Insulator Transition in a Dilute Two-Dimensional Electron System
• Spin-independent effective mass in a valley-degenerate electron system
• Comment on: Weak Anisotropy and Disorder Dependence of the In-Plane Magnetoresistance in High-Mobility (100) Si Inversion Layers
• Unusual anisotropy of inplane field magnetoresistance in ultra-high mobility SiGe/Si/SiGe quantum wells
• Test of scaling theory in two dimensions in the presence of valley splitting and intervalley scattering in Si-MOSFETs
• Spin polarization and exchange-correlation effects in transport properties of two-dimensional electron systems in silicon
• Two dimensional electrons in (100) oriented silicon field effect structures in the region of low concentrations and high mobilities
• A metal-insulator transition in 2D: Established facts and open questions
• Thermoelectric properties of the interacting two dimensional electron gas in the diffusion regime

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• Competing correlated states around the zero field Wigner crystallization transition of electrons in two-dimensions
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• Interaction-induced metallicity in a two-dimensional disordered non-Fermi liquid
• Quantum Paracrystalline Shear Modes of the Electron Liquid
• Measurements of the magnetic properties of conduction electrons
• Phase Separation in Two-Dimensional Electron Systems: Experimental View
• Band Flattening and Landau Level Merging in Strongly-Correlated Two-Dimensional Electron Systems
• Memory effect in the charge transport in strongly disordered antimony films