“New twists in two-dimensional systems due to (quasi) periodicities in space and time”

Hua Chen

Colorado State University

Monday, Oct. 19th at 4:00pm

Thanks to the discrete translation symmetry in crystalline solids, we are able to understand their macroscopic properties from basic principles of quantum mechanics through the Bloch theorem. When such a symmetry is absent in a materials system, it quickly becomes intractable to explain or predict its physical behavior based on first principles, but interesting new phenomena may also arise. A prominent example is the recent discovery of superconductivity in twisted bilayer graphene. [Read More…]

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