A self-consistent microscopic model of Coulomb interaction in a bilayer system as an origin of Drag Effect Phenomenon

Date
2008
Authors
Güven, K.
Siddiki, A.
Krishna, P. M.
Hakioǧlu T.
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Source Title
Physica E : Low-Dimensional Systems and Nanostructures
Print ISSN
1386-9477
Electronic ISSN
1873-1759
Publisher
Elsevier B.V.
Volume
40
Issue
5
Pages
1169 - 1171
Language
English
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Abstract

In this work we implement the self-consistent Thomas-Fermi model that also incorporates a local conductivity model to an electron-electron bilayer system, in order to describe novel magneto-transport properties such as the Drag Phenomenon. The model can successfully account for the poor screening of the potential within the incompressible strips and its impact on the inter-layer Coulomb interaction. An externally applied current in the active layer results in the tilting of the Landau levels and built-up of a Hall potential across the layer, which, in turn, induces a tilted potential profile in the passive layer as well. We investigate the effect of the current intensity, temperature, magnetic field, and unequal density of layers on the self-consistent density and potential profiles of the bilayer system.

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