University of Waterloo
200 University Avenue West
Waterloo, Ontario, Canada N2L 3G1
Phone: (519) 888-4567 ext 32215
Fax: (519) 746-8115
Professor Boris Spivak, Department of Physics, University of Washington
I present an overview of the measured transport properties of two dimensional electron fluids in high mobility semiconductor devices with low electron densities, and of some of the theories that have been proposed to account for them. Many features of the observations are not easily reconciled with a description based on the well understood physics of weakly interacting quasiparticles in a disordered medium. Rather, they reflect new physics associated with strong correlation effects.Some of the properties of the system are related to the fact that in two dimensional electron systems with Coulomb or dipolar interactions, a direct transition, whether first or second order, from a liquid to a crystalline state is forbidden. As a result, between these phases there must be other (electronic-microemulsion) phases which can beviewed as a meso-scale mixture of the liquid and crystalline phases. I will discuss the transport properties of these new electronic phases and present arguments that they may be responsible for the various transport anomalies that have been seen in experiments.