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Re-entrant magic-angle phenomena in twisted bilayer graphene in integer magnetic fluxes
Yifei Guan, Oleg V. Yazyev, Alexander Kruchkov
In this work we address the re-entrance of magic-angle phenomena (band flatness and quantum-geometric transport) in twisted bilayer graphene (TBG) subjected to strong magnetic flux…
Moiré Flat Bands in Twisted Double Bilayer Graphene
Fatemeh Haddadi, QuanSheng Wu, Alex J. Kruchkov +1
We investigate twisted double bilayer graphene (TDBG), a four-layer system composed of two AB-stacked graphene bilayers rotated with respect to each other by a small angle. Our ab…
Non-Hermitian Boundary Modes
Dan S. Borgnia, Alex Jura Kruchkov, Robert-Jan Slager
We consider conditions for the existence of boundary modes in non-Hermitian systems with edges of arbitrary co-dimension. Through a universal formulation of formation criteria for…