Spatially indirect exciton condensate phases in double bilayer graphene

Jung-Jung Su, Allan H. Macdonald

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We present a theory of spatially indirect exciton condensate states in systems composed of a pair of electrically isolated Bernal graphene bilayers. The ground-state phase diagram in a two-dimensional displacement-field/inter-bilayer-bias space includes layer-polarized semiconductors, spin-density-wave states, exciton condensates, and states with mixed excitonic and spin order. We find that two different condensate states, distinguished by a chirality index, are stable under different electrical control conditions.

Original languageEnglish
Article number045416
JournalPhysical Review B
Issue number4
StatePublished - 18 Jan 2017

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