Correlations weak and strong: divers guises of the two-dimensional electron gas

Abstract

The three-dimensional electron-gas model has been a major focus for many-body theory applied to the electronic properties of metals and semiconductors. Because the model neglects band effects, whereas electronic systems are generally more strongly correlated in narrow band systems, it is most widely used to describe the qualitative physics of weakly correlated metals with unambiguous Fermi liquid properties. The model is more interesting in two space dimensions because it provides a quantitative description of electrons in quantum wells and because these can form strongly correlated many-particle states. We illustrate the range of possible many-particle behaviors by discussing the way correlations are manifested in 2D tunneling spectroscopy experiments.

Based on talk at MBIX conference, Sydney, July 1997. 12 pages, 3 figures

References in corpus (7)

• Correlated Electrons in High Temperature Superconductors
• Lifetime of Two-Dimensional Electrons Measured by Tunneling Spectroscopy
• Coulomb scattering lifetime of a two-dimensional electron gas
• Electron-electron interactions and two-dimensional - two-dimensional tunneling
• Tunneling Conductance Between Parallel Two Dimensional Electron Systems
• Universal Linear Density of States for Tunneling into the Two-Dimensional Electron Gas in a Magnetic field
• Tunneling Between a Pair of Parallel Hall Droplets