Magnetoplasmons bound to short-range impurities in graphene : symmetries and optics
Fischer, Andrea M., Roemer, Rudolf A. and Dzyubenko, Alexander B.. (2011) Magnetoplasmons bound to short-range impurities in graphene : symmetries and optics. Physical Review B (Condensed Matter and Materials Physics), Vol.84 (No.16). article no. 165431 . ISSN 1098-0121Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevB.84.165431
We consider a graphene sheet in the presence of a strong perpendicular magnetic field with a single short-range δ 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|
|Subjects:||Q Science > QC Physics|
|Divisions:||Other > Institute of Advanced Study
Faculty of Science > Physics
Faculty of Science > Centre for Scientific Computing
|Library of Congress Subject Headings (LCSH):||Plasmons (Physics), Graphene, Magnetic fields, Spin excitations|
|Journal or Publication Title:||Physical Review B (Condensed Matter and Materials Physics)|
|Publisher:||American Physical Society|
|Number of Pages:||11|
|Page Range:||article no. 165431|
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