"Strongly Correlated Electron Systems: from Mott to Hunds" by Gabriel Kotliar (Rutgers University)

Date: 
Thursday, October 8, 2015 - 4:00pm to 5:00pm
Series: 
Physics and Astronomy Colloquium

Thursdays, 4:00-5:00 pm

1-434 Physics and Astronomy (map)
Reception from 3:30-4:00 p.m.
(unless otherwise posted)

Guest Speaker: Gabriel Kotliar (Rutgers University)

Talk Title:  “Strongly Correlated Electron Systems: from Mott to Hunds”

Abstract:

The detailed understanding of simple materials, are one of the great achievements of the twentieth century. Fermi Liquid Theory, and the Kohn Sham formulation of the density functional theory, form the basis of our “standard model” of solid state physics and have provided us with an accurate description of many materials of great technological significance.

Correlated electron systems are materials for which the “standard model” of solid state physics breaks down. They give rise to surprising phenomena, such as metal to insulator transitions and high temperature superconductivity.  Correlated electron materials continue to be discovered accidentally and surprise us with their exceptional physical properties and their potential for applications. The most recent example in a long series of discoveries is provided by the iron arsenide based high temperature superconductors.

In this colloquium I will give an elementary introduction to the field of strongly correlated electron materials thru the lens of Dynamical Mean Field Theory (DMFT) a non perturbative approach which provides a zeroth order picture of the strong correlation phenomena.

There are multiple different roads to strong correlation behavior, driven by strong on site interaction (Mott physics ) and strong local ferromagnetic correlations (Hunds physics).  Several examples, will be presented to show how the anomalous properties of correlated materials emerge from their atomic constituents.

I will conclude with an outlook of the challenges ahead and the perspectives for rational material design using strongly correlated electron systems.

For more information, contact Jay Hauser

We thank the following people for their contributions to the wine fund for the post-colloquium reception:
Prof. Dolores Bozovic, Prof. Mike Cornwall, Prof. Bob Cousins, Prof. Andrea Ghez, Prof. Karoly Holczer, Prof. Eric Hudson, Robert Huff, Prof. Alex Kusenko, Prof. Myank Mehta, Prof. John Miao, Prof. Roberto Peccei, Prof. Claudio Pellegrini, Prof. David Saltzberg, Prof. Jean Turner and Prof. Ben Zuckerman.

Location: 
1-434 PAB