title: Field-induced Kosterlitz-Thouless transition in the n=0 Landau level of graphene.
abstract: At the charge neutral point, graphene exhibits a very unusual high-resistance metallic state and a transition to a complete insulating phase in a strong magnetic field. We propose that the current carriers in this state are the charged vortices of the XY valley-pseudospin order parameter, a situation which is dual to a conventional thin superconducting film. We study energetics and the stability of this phase in the presence of disorder.
authors.affiliation: Department of Physics, Tohoku University, Sendai, 980-8578, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Nomura
authors.forename: Shinsei
authors.initials: S
authors.lastname: Ryu
authors.forename: Dung-Hai
authors.initials: DH
authors.lastname: Lee