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

✍ Scribed by L.H. Ho; A.P. Micolich; A.R. Hamilton; O.P. Sushkov

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 228 KB
• Volume: 42
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/j.physe.2009.10.027

✦ Synopsis

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.