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Localised magneto-optical collective excitations of impure graphene
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Fischer, Andrea M., Dzyubenko, Alexander B. and Roemer, Rudolf A.. (2009) Localised magneto-optical collective excitations of impure graphene. Annalen der Physik, Vol.18 (No.12 Sp. Iss. SI). pp. 944-948. ISSN 0003-3804
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Official URL: http://dx.doi.org/10.1002/andp.200910381
Abstract
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 delta-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. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
| 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): | Magnetooptics, Graphene, Plasmons (Physics), Collective excitations |
| Journal or Publication Title: | Annalen der Physik |
| Publisher: | Wiley - VCH Verlag GmbH & Co. KGaA |
| ISSN: | 0003-3804 |
| Date: | December 2009 |
| Volume: | Vol.18 |
| Number: | No.12 Sp. Iss. SI |
| Number of Pages: | 5 |
| Page Range: | pp. 944-948 |
| Identification Number: | 10.1002/andp.200910381 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Conference Paper Type: | Paper |
| Type of Event: | Conference |
| References: | [1] A.H. Castro Neto, F. Guinea, N. M. R. Peres, K. S. Novoselov, and A.K. Geim Rev. Mod. Phys. 81(1), 109 (2009). [2] M. M¨uller, J. Schmalian, and L. Fritz, Phys. Rev. Lett. 103(2), 025301 (2009). [3] A.G. Grushin, B. Valenzuela, and M.A.H. Vozmediano, Phys. Rev. B 80, 155417 (2009). [4] A.M. Fischer, A.B. Dzyubenko, and R.A. Roemer, Phys. Rev. B 80, 165410 (2009). [5] A.M. Fischer, A.B. Dzyubenko, and R.A. Roemer, Localised collective excitations of graphene in a strong magnetic field with a delta function impurity, (in preparation, 2009). [6] Y. Zhang, Z. Jiang, J. P. Small, M. S. Purewal, Y.W. Tan, M. Fazlollahi, J.D. Chudow, J. A. Jaszczak, H. L. Stormer, and P. Kim , Phys. Rev. Lett. 96(13), 136806 (2006). [7] T. Ando and T. Nakanishi, J. Phys. Soc. Jpn. 67(5), 1704–1713 (1998). � |
| URI: | http://wrap.warwick.ac.uk/id/eprint/16610 |
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