Condensed Matter Theory Seminar - Patrick Ledwith - “Bridging Hubbard and quantum Hall physics in twisted bilayer graphene”

Event time: 
Thursday, February 8, 2024 - 1:00pm to 2:00pm
Sloane Physics Laboratory SPL, Room 51 See map
217 Prospect Street
New Haven, CT 06511
Patrick Ledwith - Harvard University
Event description: 

We will discuss a model for the twisted bilayer graphene flat bands that centers the concentration of charge density and, relatedly, the concentration of Berry flux. After establishing good quantitative agreement with more microscopic models, we will show how the model hosts parametrically decoupled flavor moments. These flavor moments are tied to Wannier states that are power-law delocalized, with infinite localization length, that nonetheless have parametrically small overlap with each other. We conclude by discussing some experimental implications for this picture.