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Hierarchy of Symmetry Breaking Correlated Phases in Twisted Bilayer Graphene
Robert Polski, Yiran Zhang, Yang Peng +8
Twisted bilayer graphene (TBG) near the magic twist angle of exhibits a rich phase diagram. However, the interplay between different phases and their dependence on tw…
Interaction-driven Band Flattening and Correlated Phases in Twisted Bilayer Graphene
Youngjoon Choi, Hyunjin Kim, Cyprian Lewandowski +8
Flat electronic bands, characteristic of magic-angle twisted bilayer graphene (TBG), host a wealth of correlated phenomena. Early theoretical considerations suggested that, at the…
Tracing out Correlated Chern Insulators in Magic Angle Twisted Bilayer Graphene
Youngjoon Choi, Hyunjin Kim, Yang Peng +9
Magic-angle twisted bilayer graphene (MATBG) exhibits a range of correlated phenomena that originate from strong electron-electron interactions. These interactions make the Fermi s…
Many-body Green's function theory for electron-phonon interactions: ground state properties of the Holstein dimer
N. Säkkinen, Y. Peng, H. Appel +1
We study ground-state properties of a two-site, two-electron Holstein model describing two molecules coupled indirectly via electron-phonon interaction by using both exact diagonal…