2000/06/30 by E. Abrahams, S. V. Kravchenko, M. P. Sarachik · 2 citations
Physics and Astronomy · #cond-mat.str-el
paper · pdf · doi:10.1103/revmodphys.73.251
published as Rev. Mod. Phys. 73, 251 (2001) · To be published in Rev. Mod. Phys
arxiv created 2000/10/03 · arxiv updated 2009/11/30
For about twenty years, it has been the prevailing view that there can be no metallic state or metal-insulator transition in two dimensions in zero magnetic field. In the last several years, however, unusual behavior suggestive of such a transition has been reported in a variety of dilute two-dimensional electron and hole systems. The physics behind these observations is presently not understood. We review and discuss the main experimental findings and suggested theoretical models.