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Graphene in inhomogeneous magnetic fields: bound, quasi-bound and scattering states

Title:

Graphene in inhomogeneous magnetic fields: bound, quasi-bound and scattering states

Ramezani Masir, M and Vasilopoulos, P. and Peeters, F M (2011) Graphene in inhomogeneous magnetic fields: bound, quasi-bound and scattering states. Journal of Physics: Condensed Matter, 23 (31). p. 315301. ISSN 0953-8984

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Official URL: http://dx.doi.org/10.1088/0953-8984/23/31/315301

Abstract

The electron states in graphene-based magnetic dot and magnetic ring structures and combinations of both are investigated. The corresponding spectra are studied as a function of the radii, the strengths of the inhomogeneous magnetic field and of a uniform background field, the strength of an electrostatic barrier and the angular momentum quantum number. In the absence of an external magnetic field we have only long-lived quasi-bound and scattering states and we assess their influence on the density of states. In addition, we consider elastic electron scattering by a magnetic dot, whose average B vanishes, and show that the Hall and longitudinal resistivities, as a function of the Fermi energy, exhibit a pronounced oscillatory structure due to the presence of quasi-bound states. Depending on the dot parameters this oscillatory structure differs substantially for energies below and above the first Landau level.


Divisions:Concordia University > Faculty of Arts and Science > Physics
Item Type:Article
Refereed:Yes
Authors:Ramezani Masir, M and Vasilopoulos, P. and Peeters, F M
Journal or Publication:Journal of Physics: Condensed Matter
Date:15 July 2011
Keywords:75.25.+z Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.) 71.20.Tx Fullerenes and related materials; intercalation compounds 72.20.My Galvanomagnetic and other magnetotransport effects 73.20.-r Electron states at surfaces and interfaces
ID Code:15174
Deposited By:DANIELLE DENNIE
Deposited On:02 Sep 2011 14:15
Last Modified:02 Sep 2011 14:15
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