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Physics and Astronomy

Physics & Astronomy Colloquium

3:30 PM, Friday, March 30, 2012
Room 155, Chem-Phys Building

Dr. Gene Mele
Department of Physics and Astronomy
University of Pennsylvania

"Topological Band Theory and Twisted Multilayer Graphene''

Topological insulators are a recently discovered quantum electronic phase of matter. This talk will give a brief overview of the known electronic phases of matter, focusing on the unique properties of topological insulators and their discovery from a careful consideration of the low energy electronic physics of single-layer graphene. Closely related topological ideas are then used to analyze the mysterious electronic behavior of a family of multilayer graphenes known as “twisted” graphenes in which a rotation of neighboring layers leads to unexpectedly rich low energy physics.

Refreshments will be served in CP 179 at 3:15 PM