Ground-plane screening of Coulomb interactions by a nearby two-dimensional system

The use of a nearby metallic ground-plane to limit the range of the Coulomb interactions between carriers is a useful approach in studying the physics of two-dimensional (2D) systems. This approach has been used to study Wigner crystallization of electrons on the surface of liquid helium, and insula...

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Bibliographic Details
Published in:Physica. E, Low-dimensional systems & nanostructures Low-dimensional systems & nanostructures, 2010-02, Vol.42 (4), p.1228-1231
Main Authors: Ho, L.H., Micolich, A.P., Hamilton, A.R., Sushkov, O.P.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Coulomb interaction
Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Exact sciences and technology
Ground plane
Physics
Screening
Two-dimensional (2D)
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Summary:The use of a nearby metallic ground-plane to limit the range of the Coulomb interactions between carriers is a useful approach in studying the physics of two-dimensional (2D) systems. This approach has been used to study Wigner crystallization of electrons on the surface of liquid helium, and insulating behaviour of semiconductor two-dimensional systems. We recently reported a variation of this technique where an adjacent 2D system was used as the ground plane instead of a metal gate. In this paper, we perform calculations of the ground plane screening effect of a 2D system and show that it is as effective as a metal in screening Coulomb interactions.
ISSN:1386-9477
1873-1759
DOI:10.1016/j.physe.2009.10.027