2010/04/12 by É. V. Gorbar, E. V. Gorbar, V. P. Gusynin +1 · 4 citations
Materials Science · Physics and Astronomy · #Graphene research and applications #Phase (matter) #Phase diagram #Physics #Quantum and electron transport phenomena #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.81.155451
published as Phys. Rev. B 81 (2010) 155451 · 14 pages, 4 figures
arxiv created 2010/04/12 · openalex publication_date 2010/04/26 · arxiv updated 2010/04/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Utilizing the Baym-Kadanoff formalism with the polarization function calculated in the random phase approximation, the dynamics of the \ensuremathν=0 quantum Hall state in bilayer graphene is analyzed. Two phases with nonzero energy gap, the ferromagnetic and layer asymmetric ones, are found. The phase diagram in the plane (\stackrel\ifmmode \else \~\fi\ensuremathΔ0,B), where \stackrel\ifmmode \else \~\fi\ensuremathΔ0 is a top-bottom gates voltage imbalance, is described. It is shown that the energy gaps in these phases scale linearly, \ensuremathΔE\ensuremath∼10B [T]K, with magnetic field. The comparison of these results with recent experiments in bilayer graphene is presented.