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Magnetoplasmons bound to short-range impurities in graphene: Symmetries and optics
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Fischer, Andrea M., Römer, Rudolf A. and Dzyubenko, Alexander (2011) Magnetoplasmons bound to short-range impurities in graphene: Symmetries and optics. Physical Review B (Condensed Matter and Materials Physics), Vol.84 (No.16). Arrticle No.165431. doi:10.1103/PhysRevB.84.165431 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.84.165431
Abstract
We consider a graphene sheet in the presence of a strong perpendicular magnetic field with a single short-range delta impurity situated at one of the carbon sites. We study the neutral inter-Landau level collective excitations, magnetoplasmons, which become localized on the impurity. Some of these excitations involve a pseudospin flip (intervalley transitions), since the impurity can scatter electrons between the two valleys. We propose a classification of states of the excitations in graphene and introduce the appropriate quantum numbers. The energies and optical strengths of collective excitations are calculated for a range of integer filling factors and impurity strengths. We establish a set of symmetries matching the energies and absorption strengths of collective excitations for different sublattice locations of the impurity, filling factors, circular light polarizations, and signs of the impurity potential.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||
Publisher: | American Physical Society | ||||
ISSN: | 1098-0121 | ||||
Official Date: | 2011 | ||||
Dates: |
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Volume: | Vol.84 | ||||
Number: | No.16 | ||||
Page Range: | Arrticle No.165431 | ||||
DOI: | 10.1103/PhysRevB.84.165431 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | Cottrell Research Corporation (CSUB) |
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