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- W4225624117 abstract "We introduce and analyze a model that sheds light on the interplay between correlated insulating states, superconductivity, and flavor-symmetry breaking in magic angle twisted bilayer graphene. Using a variational mean-field theory, we determine the normal-state phase diagram of our model as a function of the band filling. The model features robust insulators at even integer fillings, occasional weaker insulators at odd integer fillings, and a pattern of flavor-symmetry breaking at non-integer fillings. Adding a phonon-mediated inter-valley retarded attractive interaction, we obtain strong-coupling superconducting domes, whose structure is in qualitative agreement with experiments. Our model elucidates how the intricate form of the interactions and the particle-hole asymmetry of the electronic structure determine the phase diagram. It also explains how subtle differences between devices may lead to the different behaviors observed experimentally. A similar model can be applied with minor modifications to other moir'{e} systems, such as twisted trilayer graphene." @default.
- W4225624117 created "2022-05-05" @default.
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- W4225624117 date "2021-12-10" @default.
- W4225624117 modified "2023-10-10" @default.
- W4225624117 title "Theory of Correlated Insulators and Superconductivity in Twisted Bilayer Graphene" @default.
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- W4225624117 doi "https://doi.org/10.1103/physrevlett.127.247703" @default.
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