Date/Time
Date(s) - 27/10/2010
3:20 pm - 4:20 pm

Title: Disorder, interactions, and zero-bias anomalies

Speaker: Dr. Rachel Wortis, Ternt University

Institute: Trent University

Location: ABB 102

Description:

Many of the most interesting electronic behaviors arise in materials with strong electron-electron correlations. Many of these same materials are disordered either intrinsically or due to doping. The study of how electrons behave in the presence of both disorder and interactions has a long history, yet the regime of strong disorder and strong interactions remains poorly understood. The density of states is one measure of the electrons which is readily accessible to both
theorists and experimentalists. The combination of disorder and interactions is known in a number of contexts to generate a feature in the density of states at the Fermi level, a zero-bias anomaly. Experiments on strongly correlated materials and recent numerical results on the Anderson-Hubbard model, however, show behavior which is inconsistent with existing theoretical descriptions. This talk will suggest that insight into the physical origin of the zero-bias anomaly
in strongly correlated systems may be gained by examining an ensemble of two-site systems.