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Field-induced Kosterlitz-Thouless transition in the N=0 Landau level of graphene

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arxiv 0906.0159 v3 pith:4HREWDR7 submitted 2009-06-01 cond-mat.mes-hall cond-mat.str-el

Field-induced Kosterlitz-Thouless transition in the N=0 Landau level of graphene

Kentaro Nomura , Shinsei Ryu , Dung-Hai Lee This is my paper
classification cond-mat.mes-hall cond-mat.str-el
keywords graphenephasestatetransitioncarrierschargechargedcomplete
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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