Off-plane Impurity Effects in Graphene Quantum Dots

Defne Akay, Bekir Sıtkı Kandemir
2016 Cumhuriyet Üniversitesi Fen Fakültesi Fen Bilimleri Dergisi  
Within the continuum model of graphene, we study the properties of energy spectrum of graphene quantum dots in the presence of an off-plane donor/acceptor Coulomb impurities as a function of their positions. We propose a variational scheme in which the trial wave functions take into account the confinement of the carriers of graphene quantum dot together with the influence of magnetic field. The dependence of graphene quantum dot states on the location of impurity is investigated in the
more » ... ated in the presence of magnetic field. We show that the off-plane donor/acceptor hydrogenic impurity removes the degeneracy of the relativistic Fock-Darwin states, and modifies the valley splitting due to the spatial confinement.
doi:10.17776/csj.14715 fatcat:sxxmmwew4vf4vn3yfw7onkmrze