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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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
Official 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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