Tunable Strongly Correlated Band Insulator

Details Tunable Strongly Correlated Band Insulator Tunable Strongly Correlated Band Insulator

2011-07-24

arxiv.org/abs/1107.4750v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

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.

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