Speaker:    Dr. David Pines

Institute for Complex Adaptive Matter

University of California Office of the President

Title:      Emergent Behavior in Correlated Electron Superconductors

Date: Monday, October 11, 2004

Time:     4:10 p.m.

Place:    55 Roessler

Discussion of two examples of unexpected emergent behavior and the lessons they teach us about the behavior of strongly correlated electron materials. The first is the quite recently discovered scaling behavior for the emergence of itinerant heavy electron behavior as the temperature is lowered below the correlated electron Kondo temperature T*  in the  lattice of localized f-electrons found in heavy fermion materials. The second is the appearance of a new state of matter, the pseudogap state, at temperatures well above the superconducting transition temperature in the underdoped cuprate superconductors.