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VOLUME 58 (1993) | ISSUE 1 | PAGE 59
Low-frequency magnetoplasma excitations in GaAs/AlGaAs quantum wires
Plasma resonances in the rf range have been observed in quantum-wire structures in a strong magnetic field near integer values of the Landau-level filling factor (v=2 and v=4). The frequency of these resonances at v=2 is lower than that at ν=4. The Q factor decreases with increasing temperature and/or with increasing distance from an integer value of v. The experimental results show that these resonances can be associated with excitations similar to edge magnetoplasmons in an ordinary 2D system.