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Metal-insulator transition in two-dimensional electron systems | S. V. Kravchenko
; M. P. Sarachik
; | Date: |
5 Sep 2003 | Journal: | Rep. Prog. Phys. 67, 1 (2004) DOI: 10.1088/0034-4885/67/1/R01 | Subject: | Strongly Correlated Electrons | cond-mat.str-el | Abstract: | The 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 noninteracting 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 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. | Source: | arXiv, cond-mat/0309140 | Services: | Forum | Review | PDF | Favorites |
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