271 citations · 513 across the 15 of their papers we have counts for
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Helical Network Model for Twisted Bilayer Graphene
Dmitry K. Efimkin, Allan H. MacDonald
In the presence of a finite interlayer displacement field bilayer graphene has an energy gap that is dependent on stacking and largest for the stable AB and BA stacking arrangement…
Topologically Protected Helical States in Minimally Twisted Bilayer Graphene
Shengqiang Huang, Kyounghwan Kim, Dmitry K. Efimkin +6
In minimally twisted bilayer graphene, a moir{é} pattern consisting of AB and BA stacking regions separated by domain walls forms. These domain walls are predicted to support count…
Fingerprints of Berry phases in the bulk exciton spectrum of a topological insulator
Andrew A. Allocca, Dmitry K. Efimkin, Victor M. Galitski
We examine excitons formed in the bulk of a topological insulator as the system is tuned via a parameter between topological and trivial insulating phases, arguing that nontrivial…