Field-induced Confined States in Graphene
  We report an approach to confine the carriers in single-layer graphene, which leads to quantum devices with field-induced quantum confinement. We demonstrated that the Coulomb-blockade effect evolves under a uniform magnetic field perpendicular to the graphene device. Our experimental results show that field-induced quantum dots are realized in graphene, and a quantum confinement-deconfinement transition is switched by the magnetic field. 
S. Moriyama, Y. Morita, E. Watanabe, and D. Tsuya
cond-mat.mes-hall