A dynamic localization of 2D electrons at mesoscopic length scales

Abstract

We have investigated the local magneto-transport in high-quality 2D electron systems at low carrier densities. The positive magneto-resistance in perpendicular magnetic field in the strongly insulating regime has been measured to evaluate the spatial concentration of localized states within a mesoscopic region of the samples. An independent measurement of the electron density within the same region shows an unexpected correspondence between the density of electrons in the metallic regime and that of the localized states in the insulating phase. We have argued that this correspondence manifests a rigid distribution of electrons at low densities.

8 pages (incl 4 figures), double column

References in corpus (3)

• Charge Density Wave in Two-Dimensional Electron Liquid in Weak Magnetic Field
• Metal-insulator transition in 2D: resistance in the critical region
• The Droplet State and the Compressibility Anomaly in Dilute 2D Electron Systems

Cited by in corpus (10)

• Magnetotransport in disordered delta-doped heterostructures
• Low-Temperature Collapse of Electron Localisation in Two Dimensions
• Local transport in a disorder-stabilized correlated insulating phase
• Unconventional Metallicity and Giant Thermopower in a Strongly Interacting Two Dimensional Electron System
• Magnetic field induced Coulomb blockade in small disordered delta-doped heterostructures
• Observation of geometry dependent conductivity in two-dimensional electron systems
• Magnetoconductivity of Hubbard bands induced in Silicon MOSFETs
• Quantisation of Hopping Magnetoresistance Prefactor in Strongly Correlated Two-Dimensional Electron Systems
• Variation of the hopping exponent in disordered silicon MOSFETs
• Magnetic Field Induced Instabilities in Localised Two-Dimensional Electron Systems