Phone: +44 (24) 765 74752, Fax: +44 (24) 765 73133
Localised magneto-optical collective excitations of impure graphene
Article first published online: 20 JAN 2010
Copyright © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Annalen der Physik
Volume 18, Issue 12, pages 944–948, December 2009
How to Cite
Fischer, A.M., Dzyubenko, A.B. and Römer, R.A. (2009), Localised magneto-optical collective excitations of impure graphene. Ann. Phys., 18: 944–948. doi: 10.1002/andp.200910381
- Issue published online: 20 JAN 2010
- Article first published online: 20 JAN 2010
- Manuscript Accepted: 5 SEP 2009
- Manuscript Received: 1 SEP 2009
- collective excitations.
We study optically-induced collective excitations of graphene in the presence of a strong perpendicular magnetic field and a single impurity. We determine the energies and absorption strengths of these excitations, which become localised on the impurity. Two different types of impurity are considered i. the long-range Coulomb impurity, ii. a δ-function impurity located at either an A or B graphene sublattice site. Both impurity types result in some bound states appearing both above and below the magnetoplasmon continuum, although the effect of the short-range impurity is less pronounced. The dependence of the energies and oscillator strengths of the bound states on the filling factor is investigated.