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Phases of the excitonic condensate in two-layer graphene

Research output: Contribution to journalJournal article

Published
Article number155405
<mark>Journal publication date</mark>4/10/2012
<mark>Journal</mark>Physical review b
Issue number15
Volume86
Number of pages10
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

Two graphene monolayers that are oppositely charged and placed close to each other are considered. Taking into account valley and spin degeneracy of electrons, we analyze the symmetry of the excitonic insulator states in such a system and build a phase diagram that takes into account the effect of the symmetry breaking due to the external in-plane magnetic field and the carrier density imbalance between the layers.

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