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