Speaker
Andrey Chubukov
(University of Minnesota)
Description
Recent experiments on Bernal bilayer graphene in a finite displacement field discovered a cascade of phase transitions into ordered states at small but finite doping. I will discuss four possible orders, which involve spin and valley degrees of freedom, and analyze superconductivity near each of these ordered states. I will argue that near some of these ordered states, the pairing interaction, mediated by a soft near-critical boson, is attractive, but near other ordered states it remains repulsive. I will discuss how one can still obtain superconductivity, even when boson-mediated pairing interaction is repulsive.
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Primary author
Andrey Chubukov
(University of Minnesota)
