Manifestation of the magnetic depopulation of one-dimensional subbands in the optical absorption of acoustic magnetoplasmons in side-gated quantum wires

1997/11/17 by C. Steinebach, T. Kurth, D. Heitmann +2
Engineering · Physics and Astronomy · #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #Semiconductor materials and devices #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1016/s0921-4526(98)00258-0

published as Physica B 249-251, 617 (1998) · LaTeX-file, 4 pages with 3 included ps-figures, to appear in Physica E

arxiv created 1997/11/17 · openalex publication_date 1998/06/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We have investigated experimentally and theoretically the far-infrared (FIR) absorption of gated, deep-mesa-etched GaAs/Al_xGa_1-xAs 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.

Related

• Intrasubband plasmons in a finite array of quantum wires placed into an external magnetic field
• The far-infrared absorption of a periodic 2DEG in the transition regime between weak and strong modulation
• Novel edge magnetoplasmons with dissipation localized near the edges for very low temperatures and sharp density profiles
• Edge magnetoplasmons in a partially screened two-dimensional electron gas on a helium surface
• Spatial dispersion of magnetic-edge magnetoplasmons: Effect of semi-infinite gate