Graphene in a strong magnetic field: Massless Dirac particles versus skyrmions.
Phys. Rev. B 78 (19), p. 195426.
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We discuss models for massless Dirac fermions being subjected to a perpendicular magnetic field in spherical geometry. These models are analogs of Haldane's spherical construction for massful charge carriers. The single-particle states constructed here are easily implemented in existing numerical code for many-body problems in conventional quantum Hall systems. Moreover, the many-body states of ...
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