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Gapped bilayer Graphene: a tunable strongly correlated band insulator

Research output: Contribution to journalJournal article


Article number106801
Journal publication date7/09/2012
JournalPhysical Review Letters
Number of pages5
Early online date7/09/12
Original languageEnglish


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 observable properties. A remarkable example of the SCI is bilayer graphene which is shown to be tunable between the SCI and usual weak coupling regime.

Bibliographic note

©2012 American Physical Society