Spontaneous broken time reversal symmetry and persistent current states in bilayer graphene

ORAL

Abstract

We report on the possibility of electron interaction driven spontaneously broken time reversal symmetry states in bilayer graphene through Fermi surface instability (aka Pomeranchuk instability) in both $\ell =0$ and $\ell =1$ channels. The conditions for spontaneous current carrying equilibrium states are most favorable in the regime of high interlayer potential difference and finite doping. These states are accompanied by valley polarization, which leads to a finite Hall conductivity that is approximately proportional to carrier density. Ref. cond-mat arXiv:1111.1765

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Authors

  • Jeil Jung

    Department of Physics, University of Texas at Austin, USA

  • Marco Polini

    NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, I-56126 Pisa, Italy, NEST, Istituto Nanoscienze-CNR

  • Allan MacDonald

    University of Texas at Austin, Department of Physics, University of Texas at Austin, Department of Physics, University of Texas at Austin, Austin, Texas 78712, Department of Physics, University of Texas at Austin, USA