A metal-insulator transition in 2D: Established facts and open questions
Abstract
The discovery of a metallic state and a metal-insulator transition (MIT) in two-dimensional (2D) electron systems challenges one of the most influential paradigms of modern mesoscopic physics, namely, that "there is no true metallic behavior in two dimensions". However, this conclusion was drawn for systems of noninteracting or weakly interacting carriers, while in all 2D systems exhibiting the metal-insulator transition, the interaction energy greatly exceeds all other energy scales. We review the main experimental findings and show that, although significant progress has been achieved in our understanding of the MIT in 2D, many open questions remain.
Keywords
Cite
@article{arxiv.1003.2968,
title = {A metal-insulator transition in 2D: Established facts and open questions},
author = {S. V. Kravchenko and M. P. Sarachik},
journal= {arXiv preprint arXiv:1003.2968},
year = {2017}
}
Comments
Review article for "50 Years of Anderson Localization". A paragraph briefly describing a theory, based on the Pomeranchuk effect, has been added.