Correlated adatom in graphene: a mean field theory study with spin-flip interaction

  • H. O. FROTA Department of Physics, Institute of Exact Sciences Federal University of Amazonas, Brazil
  • ANGSULA GHOSH Department of Physics, Institute of Exact Sciences Federal University of Amazonas, Brazil
Keywords: graphene, Graphene, Adatoms, Conductance, Magnetic moment, Anderson model

Abstract

The formation of the localized magnetic moments is studied ina single-layer graphene sheet due to the presence of a quantum dot inone of the sublattices of the graphene sheet. The strong on-site Coulombinteraction and the spin flip terms have been considered to calculatethe conductance using the Landauer formalism. The bare splitting ofthe levels and the Coulomb interaction generate the multipleconductance peaks and are crucial in determining the boundarybetween the magnetic and the non-magnetic states. A strong chemicalpotential dependence of the above phase boundary and also theconductance values are evident.

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Published
2020-05-04
Section
Articles