Novel phenomena in dilute electron systems in two dimensions.

Sarachik, M P; Kravchenko, S V · Proc Natl Acad Sci U S A · 1999

basic_science · Level V

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Abstract

For the past two decades, all two-dimensional systems of electrons were believed to be insulating in the limit of zero temperature. Recent experiments provide evidence for an unexpected transition to a conducting phase at very low electron densities. The nature of this phase is not understood and is currently the focus of intense theoretical and experimental attention.