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Symmetry content and spectral properties of charged collective excitations for graphene in strong magnetic fields
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Fischer, Andrea M., Roemer, Rudolf A. and Dzyubenko, Alexander B. (2010) Symmetry content and spectral properties of charged collective excitations for graphene in strong magnetic fields. EPL (Europhysics Letters), Vol.92 (No.3). Article no. 37003. doi:10.1209/0295-5075/92/37003
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Official URL: http://dx.doi.org/10.1209/0295-5075/92/37003
Abstract
We show that graphene in a strong magnetic field with partially filled Landau levels sustains charged collective excitations—bound states of a neutral magnetoplasmon and free particles. In the limit of low density of excess charges, these are bound three-particle complexes. Some of these states are optically bright and may be detected in spectroscopy experiments, providing a direct probe of electron-electron interactions in graphene. The charged excitations can be classified using the geometrical symmetries—non-commutative magnetic translations and generalized rotations—in addition to the dynamical SU4 symmetry in graphene. From the SU4 symmetry point of view, such excitations are analogous to bound states of two quarks and one antiquark with four flavors. We establish a flavor optical selection rule to identify the bright states for experimental studies.
| 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 |
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| Library of Congress Subject Headings (LCSH): | Graphene, Magnetic fields, Spin excitations | ||||
| Journal or Publication Title: | EPL (Europhysics Letters) | ||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||
| ISSN: | 0295-5075 | ||||
| Official Date: | 2010 | ||||
| Dates: |
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| Volume: | Vol.92 | ||||
| Number: | No.3 | ||||
| Page Range: | Article no. 37003 | ||||
| DOI: | 10.1209/0295-5075/92/37003 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Research Corporation, Kavli Institute for Theoretical Physics (KITP), University of California, Santa Barbara (UCSB) |
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