Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-09-29
Phys. Rev. B 83, 085406 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
10.1103/PhysRevB.83.085406
We investigate the effects of point and line defects in monolayer graphene within the framework of the Hubbard model, using a self-consistent mean field theory. These defects are found to induce characteristic patterns into the electronic density of states and cause non-uniform distributions of magnetic moments in the vicinity of the impurity sites. Specifically, defect induced resonance bound states in the local density of states are observed at energies close to the Dirac points. The magnitudes of the frequencies of these resonance states are shown to decrease with the strength of the scattering potential, whereas their amplitudes decay algebraically with increasing distance from the defect. For the case of defect clusters, we observe that with increasing defect cluster size the local magnetic moments in the vicinity of the cluster center are strongly enhanced. Furthermore, non-trivial impurity induced magnetic patterns are observed in the presence of line defects: zigzag line defects are found to introduce stronger-amplitude magnetic patterns than armchair line defects. When the scattering strength of these topological defects is increased, the induced patterns of magnetic moments become more strongly localized.
Chang Yi Chen
Haas Stephan
No associations
LandOfFree
Defect Induced Resonances and Magnetic Patterns in Graphene does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Defect Induced Resonances and Magnetic Patterns in Graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Defect Induced Resonances and Magnetic Patterns in Graphene will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-524488