CPM Seminar

A Glance at Novel Quantum Correlations in the Two-Dimensional Electron Gas

Gábor Csáthy

Purdue University

The two-dimensional electron gas is a fascinating model system which has an astonishingly large number of many-body ground states. Examples are the family of fractional quantum Hall states and exotic electronic solids. Numerous fractional states can be accounted by quantum correlations set forth by the composite fermion theory. A small number of recently observed fractional states, however, cannot be explained by this theory and their description requires a more sophisticated type of electronic correlation. In this talk I will present evidence of a new high order fractional quantum Hall state at ν=2+6/13 developing at ultra low temperatures and I will discuss how this finding shaped the understanding of the exotic fractional states such as the one at ν=12/5. I will also present new results on the exotic electron solids developed in close vicinity of these fractional states.