Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1997-11-17
Physica B 249-251, 617 (1998)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
LaTeX-file, 4 pages with 3 included ps-figures, to appear in Physica E
Scientific paper
10.1016/S0921-4526(98)00258-0
We have investigated experimentally and theoretically the far-infrared (FIR) absorption of gated, deep-mesa-etched GaAs/Al$_x$Ga$_{1-x}$As quantum wires. To overcome Kohn's theorem we have in particular prepared double-layered wires and studied the acoustic magnetoplasmon branch. We find oscillations in the magnetic-field dispersion of the acoustic plasmon which are traced back to the self-consistently screened density profile in its dependence on the magnetic depopulation of the one-dimensional subbands.
Gudmundsson Vidar
Heitmann Detlef
Kurth Thorsten
Steinebach Christoph
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