S V Kravchenko and M P Sarachik 2004 Rep. Prog. Phys. 67 1 doi:10.1088/0034-4885/67/1/R01
S V Kravchenko1 and M P Sarachik2
Show affiliationsThe interplay between strong Coulomb interactions and randomness has been a long-standing problem in condensed matter physics. According to the scaling theory of localization in two-dimensional systems of non-interacting or weakly interacting electrons, the ever-present randomness causes the resistance to rise as the temperature is decreased, leading to an insulating ground state. However, new evidence has emerged within the past decade indicating a transition from the insulating to metallic phase in two-dimensional systems of strongly interacting electrons. We review earlier experiments that demonstrate the unexpected presence of a metallic phase in two dimensions, and present an overview of recent experiments with emphasis on the anomalous magnetic properties that have been observed in the vicinity of the transition.
71.30.+h Metal-insulator transitions and other electronic transitions
71.18.+y Fermi surface: calculations and measurements; effective mass, g factor
71.27.+a Strongly correlated electron systems; heavy fermions
Issue 1 (January 2004)
Received 5 September 2003
Published 1 December 2003
S V Kravchenko and M P Sarachik 2004 Rep. Prog. Phys. 67 1
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