Tunable Strongly Correlated Band Insulator
arXiv:1107.4750 · doi:10.1103/PhysRevLett.109.106801
Abstract
We introduce the notion of the strongly correlated band insulator (SCI), where the lowest energy excitations are collective modes (excitons) rather than the single particles. We construct controllable 1/N expansion for SCI to describe their observables properties. A remarkable example of the SCI is bilayer graphene which is shown to be tunable between the SCI and usual weak coupling regime.
4 pages, 4 figures
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- Theory of tunneling spectra for a few-electron bilayer graphene quantum dot
- Excitons without effective mass: biased bilayer graphene
- Extended Hubbard model describing small multi-dot arrays in bilayer graphene
- Moiré excitons in biased twisted bilayer graphene under pressure
- In-plane magnetoelectric response in bilayer graphene
- Fractional quantum Hall effect in bilayer graphene beyond the single Landau level approximation