Magnetoplasmons in an electron gas at the crossover from two- to one-dimensional behavior
- 15 October 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 42 (12) , 7637-7640
- https://doi.org/10.1103/physrevb.42.7637
Abstract
Magnetoplasmons in a strongly modulated two-dimensional electron gas are studied within the random-phase approximation, including for the first time local fields as well as screening effects in the ground state. With increasing modulation a transition from ‘‘bulk’’ to ‘‘edge’’ magnetoplasmons accompanied by a frequency lowering is observed. Our results open a new interpretation of recent far-infrared experiments and correct predictions of classical model calculations that become unphysical for submicrometer systems.Keywords
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