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Gapped bilayer Graphene: a tunable strongly correlated band insulator

Research output: Contribution to journalJournal article

Published

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Journal publication date7/09/2012
JournalPhysical Review Letters
Journal number10
Volume109
Number of pages5
Early online date7/09/12
Original languageEnglish

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 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