title: Wess-Zumino-Witten Terms in Graphene Landau Levels.
abstract: We consider the interplay between the antiferromagnetic and Kekulé valence bond solid orderings in the zero energy Landau levels of neutral monolayer and bilayer graphene. We establish the presence of Wess-Zumino-Witten terms between these orders: this implies that their quantum fluctuations are described by the deconfined critical theories of quantum spin systems. We present implications for experiments, including the possible presence of excitonic superfluidity in bilayer graphene.
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: Junhyun
authors.initials: J
authors.lastname: Lee
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.|Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2L 2Y5, Canada.
authors.forename: Subir
authors.initials: S
authors.lastname: Sachdev