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What Makes Magic: High Order van Hove Singularity in Tunable Moire Superlattices
Speaker Dr. Noah Fan Qi Yuan, Massachusetts Institute of Technology
Date 9 April 2019 (Tuesday)
Time 14:00 - 15:30
Venue Room 5583 (Lifts 29-30), HKUST

Recently, unconventional superconducting phase and correlated insulating phase in twisted bilayer graphene have attracted a lot of attention, which occurs at specific fillings and within a narrow range of twist angles (so-called magic angle). In this talk, I would like to address the following questions.

  1. What are the suitable models to describe the electronic states in twisted bilayer graphene?
  2. Why is the  “magic angle” so special?
  3. What are the possible superconducting and insulating phases at half filling?

Related topics such as strain effect and other superlattices will also be discussed.