Please use this identifier to cite or link to this item:
|Type:||Artigo de periódico|
|Title:||Electronic Structures Of Modulated Bidimensional Systems In The Presence Of A Magnetic Field|
|Author:||Andrade Neto M.A.|
|Abstract:||Recent advances in nanotechnology allow a periodic modulation of bidimensional electronic systems, like the electron gas that forms at the heterojunction of GaAs-AlGaAs. An artificial bidimensional crystal is originated by this modulation and the corresponding Fermi surface could be measured by magneto-transport techniques. In the present work the electronic structure of such a system is calculated within the framework of a tight-binding model. The bidimensional array is considered to have two types of sites, in which we originate potential barriers (the modulation) that are periodic in the host array. Magnetic field effects are introduced by means of a Peierls substitution. The limits of a weak and strong modulation are discussed. In both limits the electronic structure shows Hofstadter like spectra in some energy ranges. We analyse the modification of these spectra due to interband coupling and the transition between the mentioned limits.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.