Collective excitations and screened interactions in two-dimensional charged Bose systems
Date
1995
Authors
Advisor
Instructor
Source Title
Journal of Physics: Condensed Matter
Print ISSN
0953-8984
Electronic ISSN
Publisher
Institute of Physics Publishing Ltd.
Volume
7
Issue
30
Pages
6065 - 6073
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract
We study the collective excitation spectrum of a two-dimensional charged Bose gas interacting via long- and short-range potentials. The resulting plasmon dispersions depend on the type of interaction. Extending our results to a double-layer system, we calculate the dispersion relations of ensuing optical and acoustic plasmons, and screened interactions. The effective interactions exhibit attractive parts which may have interesting consequences. Comparison of our results with a two-dimensional electron gas is made.