The energy-level structures of the graphene quantum dot induced by the magnetic barriers
DENG Lijuan1, ZUO Kaili2, YAN Weixian2*
(1 Institute of Theoretical Physics, Shanxi University； 2 College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, Shanxi, China)
Abstract:
The energy-level structures of the graphene quantum dot influenced by magnetic barrier is investigated.Under the condition of the magnetic fields inside and outside the dot are parallel, as increase of the dot size,the energy-level structure are determined by the competition of two magnetic. The accompanying Landau levels from the field outside the dot always appear when the directions of the two vector potentials are mutually anti-parallel. The addition of the mass makes the dot to be an antidot, whereas the squared energy levels gain a constant associated with the mass.
KeyWords:
graphene quantum dot; magnetic barriers; energy-level structures
