Monday, October 17, 2022 at 4:00pm to 5:00pm
Rockefeller Hall, Schwartz Auditorium
General Physics Colloquium by Charles Kane
Christopher H. Browne Distinguished Professor of Physics
University of Pennsylvania
Title: Symmetry, topology and electronic phases of matter
Host: Chao-Ming Jian
Abstract: Symmetry and topology are two of the conceptual pillars that underlie our understanding of matter. While both ideas are old, over the past several years a new appreciation of their interplay has led to dramatic progress in our understanding of topological electronic phases. A paradigm that has emerged is that insulating electronic states with an energy gap fall into distinct topological classes. Interfaces between different topological phases exhibit gapless conducting states that are protected and are impossible to get rid of. In this talk we will discuss the application of this idea to the quantum Hall effect, topological insulators, topological semimetals and topological superconductors. The latter case has led to the quest for observing Majorana fermions in condensed matter, which opens the door to proposals for topological quantum computation. We will close by surveying the frontier of topological phases in the presence of strong interactions.
This talk will also be available via Zoom, and the link will be emailed to the Physics listserv the week of the talk. If you are not on the listserv, please contact Sue Sullivan at firstname.lastname@example.org by Monday at 3:00 pm to request the link.